What’s so great about type O negative blood?

Every so often Carter BloodCare asks the O negative blood donors in our community to step up and give to help boost the supply. This request in no way implies that other blood types are not valuable. It’s just that O negative blood is more in demand, and more often in short supply.

If you’re O neg, you’re rare! Only 7% of the world’s population is O neg. You’re also the universal red blood cell donor, which means your blood can be transfused to patients with other blood types. (Incidentally, if you are O neg, you can only receive O neg blood.) What makes O neg the universal type is that there are no A, B or D (Rh positive) antigens present on the red blood cells. This is why it’s compatible with other types, and why O neg blood is often used for emergencies and accidents, when there’s no time for blood typing before transfusion.

We appreciate all our donors, regardless of type. But it’s understandable why our O neg support is so vital to the community supply and why we often ask for help from this group. Help us spread the word- and keep giving often!


  1. Do you get paid to give blood if you are o neg?

    • Sarah – It’s against FDA regulations to pay for blood products that are used to transfuse patients. This means the blood that is used to save lives comes from people who give on a voluntary basis. Pretty awesome, right?

    • Ya not many hosiptals will derectly buy blood oddly enough they want plasma which makes AB the best donners and hositals will pay for plasma so you can they can make some bank if they cut out the middle man who wants blood donated to them for free and then turns around and sells it to hospitals…

    • Thank you for your comment Mr. Burns. When mentioning plasma, are your talking about plasma centers? Also I am not entirely clear on who you are referring to as a middleman, but here are a few facts that may help. First, as a member of America’s Blood Centers (a national network of community blood centers) we do not pay for ANY blood product that is used for patient transfusion. Studies show that volunteer donors provide a safer blood supply. (The plasma centers that do pay donors use the product for purposes other than transfusion.) Second, the cost to hospitals is necessary to cover the recruitment, collection, testing, storage and distribution of the blood. Our community donors are all volunteer donors, which is pretty amazing if you think about it. As a result, our hospitals have access to transfusion products and services that are safe and available. Hope this helps!

    • so im an O – does that mean I should donate blood to my nearest hospital?

    • O- blood is in a nationwide shortage. You can give at your local Carter BloodCare Donor Center. Follow this link to find the closest location to you:

      Carter BloodCare at 11:34 am on January 31, 2014
  2. Oh I never knew there was anything special about my blood type. I found out probably a year ago that I was o negative when I gave blood at my school. I had called in a few weeks later just asking out of curiosity. And never thought anything about it. I will definitely donate the next chance I get!

    • Good to hear Gina – I guess the more we know, the more we can help!

    • Don’t give your blood for free. You know how much hospitals make off you? You have a right not to donate, they want your blood they should pay for it. Don’t make them manipulate you into feeling like you’re saving a life? That’s not your responsibility. They’re making money off of you, and you’re walking away empty handed. Your blood is life itself don’t give it away for free….us o negatives need to stick together and donate only to other o negatives, everyone else should pay for our blood.

    • Blood donated to Carter BloodCare and similar community blood centers is part of a service to help in the medical treatment of local patients. Blood from volunteer blood donors is what most hospitals use for patients. Carter BloodCare is a non-profit blood center serving 90% of hospitals in North, Central and East Texas. We provide blood products to all blood types – not just Type O negative. It does save lives.

  3. Back in boot camp, they had a blood drive for the troops overseas. I was (roughly) grabbed by one of the DIs, who put me in a small group, away from everyone else. We were then told, “Everyone else, it’s a volunteer opportunity. You guys don’t get that choice.” I found out later that it was because I was O- and that they were in really short supply. Since then, I’ve tried to donate as much as possible.

  4. Im o- if my doctor takes blood does this mean im a donator

    • If you GIVE your blood to be used to help someone else, you are a blood donor. If your blood is taken from you by a doctor – chances are you are a patient! :)

  5. O Negative people are testing negative to monkey genes. People with this blood type tend to have a higher averagte IQ, and ironically they are more likely to have an extra vertebra in the form of a longer tailbone. Some babies have to get de-tailed at birth.
    The Queen and her strange son are both O Negative. O Negative blood is considered copper based while others are iron based.

    Another famous O Negative person is Dan Akroyd. You can decide whether that is a good thing or not. Its not known for sure what John Belushi’s blood type was.

  6. I am 0 neg this is pretty good, i love the info even if to me its a little frighting but i’m supper happy knowing i’m a rare type and i can give to all types.

  7. Im O neg. Does one of my parents have to have the same blood as Me?

    • My father explained to me that I was unique ie the only o neg pupil in the school I attended. He also told me neither he, my mother nor siblings were o neg. I would like to know if this is usual.

    • Hi JayDee. Thank you for your question! Yes, it can be quite common since an O blood type is the recessive gene. This means that a child with type O blood could have parents with type A, type B, or type O blood. You are actually very fortunate that you have an O blood type. It is known as the universal red cell donor and you can donate to anybody!

      Carter BloodCare at 12:06 pm on October 7, 2013
  8. i m very much happy to become the part of this group. i wil be grateful to god. because by this group. i can save others life as i did last month.

  9. I came to realised that am O neg. When I went to donate blood to late uncle…Thereafter i get to know some special facts about the group….Last year i donated blood three times even my younger brother i O neg.

  10. Goodto know about such organization

  11. when i found out i was o- i was happy, i brag to everyone and i tell them every time, if they need blood i will gladly save their life.

  12. hey thanks Gayle!! because of you I came to knew that I am red blood cell donor, But apart form this I also would like to know, Shall I donate blood platelets.

  13. I have O-neg, but have not donated since I ruptured my spleen. Can I still donate blood?

    • Otsie, your spleen may have taken a hit, but your blood is still as good as ever! Yes, you are eligible to donate if you feel well and healthy and meet the other criteria for donating. Hopefully we see you soon at a donor center or mobile drive.

  14. This makes me a bit more interested in donating. I thought my blood type was more common than that.

  15. I am 0- but I’m not able to donate because I lived in Europe for more than 5 years in the 90s. I want to donate but I’m not eligible because of this silly rule.

  16. i have son 4 years old, a year ago doctor told us he having a low plate. Due this he often look pail, internal bleeding. Until today Doctors still examining his blood why this happen. Some blood test such as lukimie, talasemia etc..(negativeresult) Can he become a universal donor too.? And acording to doctors if he going to get married he need to get the girl go for blood test ? I need more info?

    • We hope your son gets better soon. Since a donor has to be at least 16 years old before they can donate, let’s focus on getting him well and healthy. Based on his diagnosis and treatment, he very well can be a donor for us in the future.
      As to additional testing by his doctors, since we do not know the doctors concern, this is hard for us to address. We do encounter where the doctor would want to have his partner tested if he carried the sickle cell trait. It is used for counseling purposes as two individuals who both have the trait may pass the trait onto their children. If both parents pass on the trait the child may develop sickle cell disease. It would be best to discuss this again with his doctors.

  17. I am 0 negative. And I donate. Glad to do it, but a little concerned that of the 7% that have this blood type, here in Canada only 4% donate! A lady in Ontario had to have blood brought in from Quebec for an emergency operation. So get out there and donate fellow 0-‘s!

  18. i have o- blood any one want contact 9966499188

    • Hi Sam,

      Feel free to call us at 1-800-366-2834 if you have any questions or would like to schedule a donation appointment.

  19. Will the hospital reserve blood for you if they expect you will need it? I’m having a scheduled surgery at the end of May that I’m told will more than likely require a transfusion. I didn’t realize I had such a rare blood type and I’m scared of them running out.

    • Melanie,
      Hospitals keep an inventory of blood on hand to be prepared for emergencies and surgeries. At Carter BloodCare, we have a Special Donations Department that assists donor with donating blood for upcoming surgeries. Many donors feel comfortable going into surgery knowing that a unit or two of blood is already on hand if a transfusion is required.

      You would need to consult with your physician if this is an option for you.

  20. I am O- and I love it. Donating my blood does help but the one time I needed a transfusion after a car crash it took them a bit because it came from San Francisco and had to go to UC Davis in Sacramento.

    • This is why it is very important for everyone to give blood often! O negative blood is very special gift you can give to everyone in need.

  21. I have O negative blood type but I had some home made tattoos in the past can I still donate???

    • Yvonne you are eligible to donate if your tattoo was done at a Texas state-licensed facility. Otherwise, you are deferred you can’t donate for 12 months.

  22. im o neg if an when i die can i be inboomed an the blood saved for others

    • Hi Thomas,
      You can save more lives by giving blood every 56 days for the rest of your life. Each time you donate blood you can save three lives.

  23. Thanks for this publication. I am O neg. Which blood group can i get married to?

    • Thomas,

      You can marry a person with any blood type and it will not affect your health.

  24. I am one of the 7%. I am married to an O- man as well. Both of our boys are O-. So it is weird knowing that 7% are O- but 100% of people in my household are O-.

  25. Wow I didn’t know how much O- blood was in demand.Now that I know this I will definitely be donating.

  26. im a negtive 0+ and im going to start donateing blood.i never my blood type was so needed and rare just a nurse told me once i have the blood that could make people very well. so im going to help wish me luck.i hate needles.but knowing i could save lifes is the best reward =) x

  27. Hi, I am O- with an rh factor. Can I donate plasma and blood?

    Thanks for your feedback.

    • Hi Regina,

      It is best to discuss this with our team over the phone. Please call 1-800-DONATE-4.

  28. Hi my blood types is O neg

    mami gebgeregziabher at 5:21 am on May 24, 2013
  29. I am o neg and my husband is A neg our three kids have my bloodtype is this common

    • Lisa, Since children inherit their blood type from their parents, your children could have been born as type “O” or as type “A”. It was a 50 – 50 chance on what blood type the children would be. It seems you have won out, and the children have taken after you!

  30. christmas eve i found out i was O-neg after surgery because i had to have a blood trans,after an ectopic pregnauncty rupture. its killing me knowing i can never give blood because of this. though its an honour to have such a rare type but also scary as ive read that my body will reject a positive baby.

    Emmanuelle Smith at 8:47 am on May 26, 2013
    • Hi Emmanuelle,

      It is best if you give our experts a call at 1-800-DONATE-4. You can discuss your specific medical history to help retrieve the best answer. Thanks for reaching out to us!

  31. I’m O- blood type. Both of my parents are 0+, and my brother is also O+. How is it possible for me to be O-?

    • Hi Crista!The Rh factor is a type of protein that is on the surface of a red blood cell. Everyone has 2 markers for this, as” + +”, “+ –“ or”– –“. If you have a positive marker from both parents who are “+ +”, then you will show as “+ +” and test Rh positive. If both parents are “– –“, then you will show as “– –“ and test Rh negative. If your parents have “+ –“, they may type as Rh positive, but can pass on either a “+” or a “—“ to a child. The child of a set of parents in this case can inherit the “+” from both parents, a “+” and a “—“ from the parents, or “—“ from both. It is random, but this could explain why your parents and brother are Rh positive, and you lucked out and get to be special as an Rh negative.

      FYI: Approximately 85% of the population is Rh positive

  32. Well im O- i have always given blood but im scared what will happen if its in reverse and i need blood thats kind of scary and i hope i get the O- from one of the other 7% i give blood because people need it like all of my family in the military im just scared what will happen if its in reverse…..

    • Courtney,

      We most certainly understand your concern, but this is our job to meet the needs of patients in our community. We continue to encourage O negative donors to donate and definitely encourage you to do so as well. Thanks for reading our blog.

  33. I am an o negative blood type, about 120 lbs in weight, about 5.6 in height. I have COPD. I start to run out of blood when I have pneumonia attack. At this time I can tell I have enough blood. Is it safe for me to donate blood? I want to help but I am also a little afraid of donating blood. Also, how does the blood bank work in general. Lets say you have a patient with o negative blood type whom you can only give o negative blood. Do you always have enough o negative type blood to save this type of patient? Have you ever encountered any problems like not having enough o negative blood available and the patient suffered or died? If that’s the case, then should O negative blood type people who are not very healthy make healthy o negative blood type friends to be on the safe side? It would not look good though, I need you for your blood. A lot like a vampire.

    • Aiman, We work hard to secure 1,100 donors each day to meet the needs of community patients. So if you were to ever need blood, you will be in good hands! If you have further questions, always feel free to give us a call at 1-800-DONATE-4.

  34. I am o- and I just donated whole blood for the first time at another agency. I am scheduled to give platelets next time but everything I read says they need my blood more than my platelets. I would like to donate more often and currently I donate to the account of a little boy in El Doarado Hills who has Leukemia. Should I donate platelets or not?

    • Hi Bob!

      Thanks for reaching out. You are always welcome to give our team a call at 1-800-DONATE-4 if you are interested in what the current need is. Giving whole blood requires a waiting period of 56 days between donations. If you donate plasma (your red cells are returned to you), you may donate every 28 days. If you donate platelets (your red cells and most of your plasma is returned to you), you may donate every 7 days, for a total of 24 times in the prior 12 months.

  35. I’ve donated on and off for years, but did not realize that O- was so valued until recently.
    When I checked in to the blood donor clinic and handed them my card, the nurse said ”Oh, you’re special”.
    I didn’t know what she meant.
    When I was hooked up to the needle, I asked her and she said ”You’re O-”.
    Now I’m online looking it up, and I’m a bit surprised by all this.
    I will be going more often now, and I’m sorry that I didn’t donate more earlier.
    More people need to know about this.

    • Pat, thanks for sharing. A lot of people don’t know the importance, so we try to educate everyone to the best of our ability. We look forward to seeing you again soon!

  36. am O- but i want to know if i can marry any other blood type since am a woman and i also want to know stricktly what foods is good for me cos i hav lots of problems with intolerance…

    • Emy,

      You do not have to marry a person of the same blood type. Many married people are different blood types and it is perfectly healthy! What type of intolerance issues are you having?

  37. What was my fathers blood type if I have o- and my mother has B+ blood?

    • Steven, A person’s blood type, while inherited, is at best a good guess. An individual inherits either the blood marker, or may not (which would default to an “O”) from each parent. Working backwards, your father could have had blood type “A”, “B” or “O”. Without being able to test him, it is going to be unknown. We are able to exclude the “AB” type because your mother is a “B”, and if your father was “AB”, then the “O” type is not an option in that case for any child. Sorry we did not have a definitive answer for you, we blame science!

  38. I am O- but I have HepC and Rheumatoid Arthritis. Can I donate my own blood for myself? Can I donate for others- say with HepC patients of my blood type? My genotype is 1A.

    • Thank for contacting us. Donor eligibility guidelines are not only vast, but ever-changing. Currently, a donor can donate for their own surgery on the order of their physician. This type of special donation is called an autologous donation. This unit of blood is muck like a prescription your physician gives you. It can only be given back to you, and if it is not required, then it must be discarded. The concern would be at which facility the surgery is taking place at. Some facilities do not allow for a donor with a history of hepatitis or other blood borne illnesses to set up autologous donations.

      For donations for the general population, our governing body, the Food and Drug Administration (FDA) has set criteria for who can be considered eligible to donate blood. A history of rheumatoid arthritis is not a reason for deferral. Unfortunately, the hepatitis history is a current deferral. A donor is not allowed to donate if they have had any viral hepatitis after the age of 11 years old. Even with this disclaimer, any unit of blood that tests reactive must also be removed and discarded. There is no method to exclude blood to be received by only individuals with a similar diagnosis.

      While you are not eligible to donate, there are many ways to still help. Just by starting dialogue and asking questions you are helping to get the word out about blood and blood donations. For this we say a big THANK YOU!

  39. Do all people with an O RHD negative blood group carry a green card with them in case of an emergency?

    • Benita,
      Actually, it would be good if everyone carried a card with their blood type. Unfortunately, many people do not know their blood type, even those who are O Neg.That is one of the perks of being a blood donor, we are able to provide you your blood type. Believe it or not, many personal physicians do not have the blood type of their patients. Luckily, if the need ever arises, the staff at the medical center/hospital always conduct a blood typing on patients in case blood might be required. That is where Carter BloodCare and its labeled blood is able to be quickly matched and used for those in need. In an extreme emergency, O Neg blood is utilized, as it can be given to any recipient. Those “O”s sure do make a difference!

  40. I am on blood pressure medicine, can I still donate blood?

  41. My husband is A+ and I m B+ but my son is O neg! Why is it so?

    • Akhtar, While we inherit so many things from our parents, our blood type is one of those things that doesn’t play by the rules easily. A child can inherit the marker from their parents blood type, often referred to as ABO type, or they may not. So if you are any type (except type AB), there is a chance that your child could inherit your type, or not. The default if they do not inherit your type is type “O”.

      Since you are a “B” and your husband is an “A”, then the possibility is that a child of you two could be an “A”, from your husband’s side. The child could be a “B”, from your side. They could inherit both the “A” and the “B” and be “AB”. Additionally, the child may not inherit either, and be an “O”, which seems to be what happened in the case of your son. A sibling could easily have a different blood type.

      What a great question Akhtar! ABO type is one of those medical curiosities that keep people guessing!

  42. I had no idea my blood was in demand until my Mom told be me when I was a teen that my blood type is very rare and the best to donate. Oddly, I’ve never donated, but was ready when my grandmother became dreadfully ill. We lost her on 2/14/2010. In respect to making it a money bank, think of how many families live in poverty who need a volunteer donor. I’d rather donate voluntarily so that a poor family can see their child live a few more good year’s, and that my good neighbors is worth more than silver or gold. Giving is truly better than receiving, said with grace by Jesus Christ. Have a blessed one all.

    • O negative blood is always in great demand since it is universal; however, we encourage people with all blood types to donate regularly and we appreciate you considering donating in wake of your grandmother’s illness. We are sorry for her loss – know each time you donate a pint of blood you can potentially save three lives and that is a rewarding feeling helping others in need. If you have any other questions about donating don’t hesitate to view our FAQ page.

  43. My Blood group is o Negative. How many times in a year I can donate my blood. Now I am 35

    Mustafa Ali Khusro at 9:11 am on July 9, 2013
    • Hi Mustafa! You can donate up to 6 times each year and double reds 3 times a year. Can you schedule an appointment this week? We are in need of O negative blood. You can schedule your appointment by calling us at 1-800-DONATE-4 or here: All donors receive a free pint of BlueBell ice cream this month! Hope to see you soon!

  44. hi jus a day before i got to knw dat i am O- , and i am very happy to knw that my blood groop is rare. and i am always ready to donate my blood in every 65 days..

    • Great to hear! Thanks for being so dedicated to saving lives in your community. See you soon.

  45. I donated my blood multiple times a year because I am 0_Neg. The last time I gave I get a call from the blood center that I had the HIV virus. They told me to get my doctor to check me out and get taken care of. I have NEVER done anything to place myself in Danger of contracting HIV. I get all the tests done from my family doctor multiple times and THEY never found anything wrong or that I HAD HIV. This scared me and my wife not to mention the accusation of not being faithful. It has been 8 years since I donated and I get tested for HIV every year due to the scare that the Blood Center provided to me from my trying to help. In total I donated over 3 gallons of blood and felt it was a great way to help. But this has ruined my faith in donating and recommending anyone to donate and having your life upset by just trying to help.

    • Hi,
      We are sorry to hear about your experience. Do you mind us asking what blood center this happened at or was it at Carter
      BloodCare? We want all of our donors to have an exceptional experience. Thank you for
      expressing your concerns and we look forward to your response.

      Carter BloodCare at 10:40 am on July 18, 2013
  46. hi i am from india . i didn’t get the chance to donate my blood before. i will certainly donate my blood if anyone needs it. i have a doubt . can i donate my o-ve blood to a person whose blood group is AB-VE?

    • Do you currently live in the U.S.? It may be important first to give us a call to talk more about your eligibility to give blood. Call 1-800-DONATE-4. Hope to hear form you soon!

      Carter BloodCare at 11:24 am on July 29, 2013
  47. I’m up for donating blood, really would like to! But it gets me that the blood that is donated is turned around and sold for a high price to patients which deters me from donating. I would be glad to donate if I knew the person on the other end didn’t have to pay for it.

    • Hello Brandon,

      Thank you for reaching out to us. We appreciate you expressing your concern.

      Blood donated to Carter BloodCare and similar community blood centers is part of a service to help in the medical treatment of local patients. Blood from volunteer blood donors is what most hospitals use for patients. Carter BloodCare is a non-profit blood center serving 90% of hospitals in North, Central and East Texas. We provide blood products to all blood types. We need donations to help save patients lives and we can’t do it without our donors.

      If you have any further questions call 1-800-DONATE-4.

      – The Carter BloodCare Team

      Carter BloodCare at 12:18 pm on July 25, 2013
  48. I have O- blood. I found out when I was pregnant with my daughter. My question is, she is 15 months now and I had a D&C a few months back. Would I be able to donate blood now? It was a complicated pregnancy. I don’t have any tattoos or piercings or anything, I weigh 110 pounds and have no kind of diseases that I know of.

    • Hi Victoria, Thanks for reaching out and congratulations on your bundle of joy! It is typically ok to donate six weeks after you give birth. But, every patient is different so it may be best to discuss this with your doctor first. Also, feel free to give us a call at 1-800-DONATE-4 for further questions about your eligibility. Also, tattoos and piercings don’t keep you from donating blood as long as you had it done in a state approved licensed facility. Have a great day!

      Carter BloodCare at 11:06 am on July 29, 2013
  49. I am O negative n i am so proud of my group n be in the position to donate everyone.

    • You should be proud! Such a great and easy way to help your community. Be sure to stay up to date with us on Facebook and Twitter.

      Carter BloodCare at 9:47 am on July 29, 2013
  50. Am O-,am willing to help with my blood for free.

  51. mmm…well then i guess im gonna stop donating since being O+ is not that important…this makes me feel like “US” different blood type donors are the second choice when they can’t find O- blood types! this is wrong! why only encourage O-??? it’s like we don’t matter…WOW! just wow…at least give us some credit!

    • Harvey, O negative positive is VERY important! All blood types are important. We most certainly encourage all blood types and wrote this post specifically to educate our readers about O negative blood type since we get a lot of questions surrounding it. Please understand that each time you give blood (no matter your blood type) you can save three lives. That’s very powerful. If you have any further questions, give us a call at 1-800-DONATE-4.

      Carter BloodCare at 10:06 pm on August 11, 2013
  52. hi,guys m 18 n m o -ve girl. i feel proud to be among the 7% population but i am a little scared to.i have heard that o neg mothers have complications giving birth to second child . is it true?

    • Hi rjk, we suggest you consult your doctor prior to coming in. Also give us a call at 1-800-DONATE-4 to discuss your medical history further, so we can better assist you. Thank you for your comment!

      Carter BloodCare at 12:36 pm on August 19, 2013
    • Hello I am 47 years old and have 4 children – ages 28, 23, 16 and 12 and my blood type is RH Negative type O and I had no problems at all. ~Marie~

  53. Can I donate blood if you have had cancer before

    • Thank you for your question. We suggest you consult your doctor prior to coming in. Also give us a call at 1-800-DONATE-4 to discuss your medical history further, so we can better assist you.

      Carter BloodCare at 12:39 pm on August 19, 2013
  54. I am o- & proud to b different from da rest lol. i am willing to giv as much as i can

  55. Hmmm I understand being o- makes me rare and special but I’m not entirely sure if its a good thing, I find it a tad harsh that I can save every bodies life out there pretty much but only 7% of the population can save me odds are if I have an accident I’m screwed but hey my bloods good to save others… Another thing rh- people are said to be linked to humanoids rather than monkeys as someone previously stated I seen. Scientists have proven humans have evolved from monkeys over the years by tracing it through the blood line.. Rh+ means you are rhesus positive rhesus meaning the monkey gene. Rh- means you are negative the rhesus gene meaning you have not evolved from monkeys and perhaps some other being?weve heard of inbred dogs whys not inbred humans? I believe yes we are special but in more ways than just a universal blood group. :) look into it guys were amazing

    • Hi Kristyn, blood donated to Carter BloodCare and similar community blood centers is part of a service to help in the medical treatment of local patients. Blood from volunteer blood donors is what most hospitals use for patients. Carter BloodCare is a non-profit blood center serving 90% of hospitals in North, Central and East Texas. We provide blood products to all blood types – not just Type O negative. It does save lives.

      Carter BloodCare at 5:21 pm on August 28, 2013
  56. Hello,
    I am 0- as welI, I am courous how long does blood last once donated. I found out I was 0- when I did my adoption search. My birth mother husband was adamant that I know my blood type. Before I was allowed to speak to her. After all that she claimed she wasn’t my mother just before she died.

    Michael G Shelton at 8:09 pm on August 17, 2013
    • Hi Michael, thank you for your question. The shelf life of donated red blood cells is 42 days. Let us know if you have any other questions.

      Carter BloodCare at 5:19 pm on August 28, 2013
  57. I’m O- but I’m 14 so if I have my parents consent could I donate?

  58. I have heard that there are certain things you shouldn’t eat and should stick to a very strict diet if you are O negative. Is this true? And if so what can you tell me?

    • To comment on a couple of questions: I had three children and never had problems giving birth due to being O-, two natural births and one c-section. Also never heard that O- blood types should eat certain foods. Eat healthy foods and you should be fine.

    • Thank you for your comments. Every person is different and has different experiences but we always appreciate your feedback.

      Carter BloodCare at 5:24 pm on August 28, 2013
  59. i an unlucky man.

  60. Can u get HIV if u are neg O?

    • Thank you for your question! Getting HIV is not dependent upon blood type. If you have more questions feel free to call us at 1800-DONATE-4.

      Carter BloodCare at 5:26 pm on August 28, 2013
  61. i am not playing games bcoz i have o- blood group.

  62. why o- blood not have antigens.

  63. I have O negitive blood. I found this out when I needed transfusions with my pregnancies. Can I still donate blood even after the fact that I have had 4 blood transfusions?

    • Good afternoon Alma. A donor is only deferred for 12 months after receiving a transfusion. The number of transfusion does not impact a donor’s eligibility.If the deferral time has passed, we would love to see you!
      That O negative blood does wonders for those in need….as you know. Thanks for thinking of us, and your willingness to share the gift of life.

      Carter BloodCare at 4:01 pm on October 1, 2013
  64. i am O negative too, I had 5 children and none of them have O negative blood type too. I knew it was rare but didn’t have a clue it was only 7% of the population that carries this blood type.Didn’t know it was so in demand till I read this too. I knew I could help others and that this blood type is rare, now I feel really special now.

    • Christina, a lot of people don’t realize how important it is to donate when they are O negative. Thank you for donating and giving back. We really couldn’t do it without people like you.

      Carter BloodCare at 1:14 pm on October 10, 2013
  65. Can you find out if your blood is used?

    • Good question. Since we have so many wonderful donors and the variance of when and where products are delivered make notification of such information in a timely fashion difficult. Just know that your donation makes a difference in the lives of patients in our community. Thank you.

      Carter BloodCare at 4:21 pm on October 14, 2013
  66. This is awesome! I’ve been giving blood every few months since I’m O-. Personally, I don’t really mind the whole proccess since I always go with two of my friends, who are A+ and B+. Last time I went it was at my church, and they told me that I was the only one who had O- that had gone in the three days they were there- it made me so proud! Glad to know that I’m so rare and universal!

    • Hey Vanessa, those are the kinds of stories we love hearing! LOTS of donors giving together of all types, especially O-. Thanks for your donation! Keep on giving!

      Carter BloodCare at 12:59 pm on October 14, 2013
  67. Am o- I live here in oldsmar fl just wondering where I can go to give blood for money email me bk..thanks

    • Hi Angela, thank you for asking. We do not pay our donors for their blood, let us know if you have any other questions!

      Carter BloodCare at 11:33 am on November 3, 2013
  68. I was told by my bloodbank in NC that I had baby blood. She said something about antigens or the lack of. Could you shed some light please?

    • Donors who are told that they have “Baby Blood”, or are a “Rare Donor”, often come from the further testing that is performed on some units.

      For us here at Carter BloodCare, a donor would fall into this category due to either having a rare anti-body or antigen, or missing a common one. Blood make-up is much like a fingerprint; it is very individualized. As you are exposed to the world around you, you obtain anti-bodies and antigens that make up your blood profile. An adult who is missing a commonly occurring antigen becomes a match for infants who have yet to be exposed to and develop the antigen.
      Once identified, these donors are placed on a list with our Reference and Transfusion Department, so that if the baby/infant/child is in need of blood, our Tele-recruitment Department will call and try to schedule the donor. These donor units are set aside for these patients we have identified as needing a more specific match beyond blood type and Rh factor. It can be labor intensive, but it makes for the best match for someone requiring a transfusion.

      While we do not have access to the information from your previous blood center, know that a designation as having “Baby Blood” is a special thing!
      We appreciate you taking the time to donate for our smallest recipients.

      Carter Blood Care Editor at 10:44 am on November 6, 2013
  69. hi i am O+ve n & my husband has the same O+ve,i want to know that what is our compatibility?

    • Thanks for your question! Compatibility doesn’t depend on blood type, although that is a frequently asked question. Let us know if you have any other questions.

      Carter BloodCare at 3:26 pm on November 8, 2013
  70. my blood group is o negativ
    I am help any pepool

  71. Hello, I have donated recently at work. My first time. I passed out later that evening. Someone who gives often says I wasn’t suppose to take a hot shower. Is this true?

    • Hi Lavelle, please call 1800-DONATE-4 and they will be able to answer any questions you have. Thank you!

  72. Hai everyone.
    I am from india,i am a man O- blood.thanxs for all the ur sharing.and now i am ready for anybody who needs me.
    But obove all,i would like to leave a question?.that is,
    i am O-,and i can marry to any blood type of women.ryt?but i hv a doubt that,the doctor who gave blood test told me that,the o- blood of man is hard to form a baby,or otherwords, formation of baby is hard for o- blood.IS IT TRUE?

    • Hi Pamel, thank you for your question. We have seen donors with various blood types marry other donors with any blood type. If you have further questions about the pregnancy process as it relates to blood type, we suggest you talk to your doctor. Thank you!

      Carter BloodCare at 1:32 pm on November 19, 2013
  73. I am O-ve,and am scared!!!pls are dere any complications???

    • Hi Olusola, donating blood is a very safe process. If you have further questions, we suggest you give us a call at 1-888-480-8200 or Metro 817-412-5603. Thanks!

      Carter BloodCare at 1:34 pm on November 19, 2013
  74. I found out a few months ago I was O-Neg, & when my Dr told me I was a universal donor I didn’t know what he was talking about lol but I’m so glad I read this because the next chance I get I’m going to donate! God Bless.

  75. I am o negative,can I marry a girl with o nagetive?due to the problem they having when giving birth…

    • Thank you for your question. We suggest you consult with your doctor if you have medical concerns relating to giving birth.

      Carter BloodCare at 4:12 pm on December 3, 2013
  76. what is the process after giving birth to a baby when the mother is O negative?

    • Hi Maria, thank you so much for your question. We suggest you discuss this with your doctor, as he or she will be better able to assist you. Thanks!

      Carter BloodCare at 4:04 pm on December 3, 2013
  77. I m 30 yr female with blood group O negative. My husband is A positive. Is there any problem to conceiving. .

    • HI Deepa, thanks for your question. We suggest you consult your doctor for medical questions. If you have any more questions about blood type, give us a call at 1800-DONATE-4.

      Carter BloodCare at 4:03 pm on December 3, 2013
  78. It’s not easy to donate blood here in the UK. I’m O neg and I’ve tried to donate blood a few times and have given up now. You have to call up and make an appointment which often wont be till months later, you also must have been in perfect health for the last six weeks (at least, it could be 6 months i cant remember). On top of that, the appointments are only available selected hours of the weeks so it has to fit in to your schedule. There are plenty other forms that need filling in also before you can donate. There used to be a day where you could walk in and donate just like that.

    • We are very sorry to hear you have had difficulties donating overseas! We appreciate your willingness to give back and we are sure many of the new regulations were put in place to protect your health and wellbeing. Happy holidays!

      Carter BloodCare at 4:08 pm on December 3, 2013
  79. Me and my brother are both O neg, my mom is B neg and my dad is O pos we both ended up with my moms negative and my dads O haha funny how that worked out

    • Wow thanks for sharing! You both are very lucky that you are O negative, we encourage you to give back to others and continue to donate.

      Carter BloodCare at 4:10 pm on December 3, 2013
  80. I’m O- and I’ve been trying to donate blood for years, but I’m told I cannot bc as a tween – I lived in Germany (1986-1988)…. :/
    Very very frustrating…. it’s almost 2014..and that issue hasn’t been resolved.
    What did I do?

    • Every situation is different and our rules are constantly evolving. If you have questions concerning travel and donating, the best resource for you would be to call 1800-DONATE-4. We look forward to helping you!

      Carter BloodCare at 4:14 pm on December 3, 2013
  81. I have RH O- is there a difference in that and O-?

  82. Hi. Im a type 0- :) I’ve gotten to donate once last year and I’ve tried twice this year but my iron is always alittle low so I don’t get to. I’ve read alot of interesting things about my blood type though. Really awesome!

  83. Only 16 and today I found out I was o positive but my older brother is o negative and I find that kinda cool and I’ve learned alot from this page I read everything including the comments so that you for verything I love the knowledge I have gotten and personally I will donated until I die

  84. I wanted to answer the question about being an O-negative mom giving birth. When you are O-negative and your baby is tested and is O- positive or any positive blood type, you are given a Rhogam shot after you give birth. This shot protects you from any positive antigens your baby may have given you while you carried him or her. I have two sons who are both O-positive like my husband. I received the Rhogam shot after each birth. We are all healthy, and I donate regularly. Don’t worry! Just be sure to get the Rhogam shot IF your baby tests as a POSITIVE and you are a negative!

  85. just found out i am O negative and told my nurse sister and she said “I am special” made me feel real cool .. thinking of donating this weekend… imma donate till i little contribution to the world

  86. I gave blood this morning because I am RH Negative type O and therefore my blood will save a life for any blood type. Made me feel so good to do this and I was not paid. My blood was a gift from my heart to whomever in the future needs it <3

  87. I just recently donated blood and they told me that I was O negative. They also told my brother and my mother that they are o neg. I will be donating more often since my blood type is in demand!

  88. seriously? youre wanting to know if you can be paid to donate your blood? this isn’t sperm, or eggs or something… this saves lives. honestly I am proud and more than happy to be able to donate my blood to anyone and to help save a life or many lives. that’s also why I am an organ donor. giving someone another chance at life is payment enough.

  89. Hi. My wife is O- and we struggled to get blood for her during her open heart operation in 2011. We have 3 healthly children and she is doing very well 3-years after the operation.

    jonathan mulaisho at 8:10 am on May 19, 2014
  90. So I donated my plasma at a school blood drive. Honestly my biggest fear is needles. But I thought that not donating blood because of my irrational fear was well stupid. There are people out there that really need this and it honestly doesn’t take anything to donate u sit there for a bit and then get a treat and boom it on your way. Though I was sorta freaking out from my fear of needles I promised myself that if I had one of the needed blood types I’d go back and donate again and what do you know I’m o-. So now I’m doing a bit more research and plan to go and donate as soon as possible.

  91. Wow, both my parents have o- and my brothers and me. I always knew that everyone could use it and that we could only get blood from other 0- people but I never knew it was rare. My brother gives blood all the time now that he’s older. I believe my other brother will to when he’s older. I want to but I’m kind of small so I’m worried I’ll pass out and I’m a little freaked by needles.

  92. This is great info…. We have a lot og O- in my family me my Daughter and my Mother, Aunt, Cousin and her Daughter…

  93. This is pretty awesome. I found out that I was rh negative when I had my first child. They said I had to receive the rhogam shot because of my blood type. I’ve always been scared to donate because I never have. But if it means saving someone else’s life, I will do :)

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