negative rh factor

[canadiana]

My mother swears up and down that I'm O+ (they tested my blood type when I was born  because my mother has a negative rh factor), but my blood test says I'm O-... I'm having trouble understanding, but it seems like if I have weak or partial D antigens, I could be positive but test negative? Or something like that? Maybe they were just wrong when they did my blood test when I was a baby...or maybe they were wrong this time... I'm glad they actually bothered to check, because I really thought I was positive, and now I'm probably going to need shots to protect the baby...
Has anyone else had this happen... Thinking you're one blood type and then finding out you're another? I was really surprised, because I spent my whole life thinking I was O+...

[krissy134]

Being Rh- you get a shot at 28 weeks and one at the birth. If you ever have a miscarriage or blood transfusions you need one too. Normally before they give you the shot they will RETEST your blood just to be certain. From what I have learned do from my doctor is that it doesn't affect your first child but your future children. Your body can/will kill off any positive blood type babies because your body thinks of it as foreign. I am O- and my husband is O+. My first baby was born with O+ so I'm glad I got the shots.

[knufrio]

If they happened to make a mistake and they say your negative and give you the Rhogam that's fine, it will do no harm if you are really positive and get the shots. The issue would be is you tested positive but were really negative. This almost never happens though because the Du antigen that can show up rather weakly would only be mistakenly read as negative, not the other way around

[canadiana]

FirstMommy06, I think I might ask for another blood test. My midwife will probably think I'm crazy, but I would rather double check than spend the rest of my pregnancy feeling anxiety over this.

[knufrio]

Yes oh my gosh im so sorry! as I was typing my husband was talking to Me and I typed it backwards! Yes if mom is negative and dad is positive there could be a problem, but again if mom is negative and dad is pos there is a 75%,chance baby will be positive. Me and my hubby are both O+ so no issue for us.

[FirstMommy06]

I was blood tested awhile back before pregnancy and I was O- & now theyre saying that Im O+. Yeah Im concerned as well thought the same thing. Who is wrong??

[canadiana]

Knufrio, It's the other way around, actually. If you're positive then it doesn't matter because your body won't attack baby, but if you're negative and daddy is positive, or you don't know what daddy is, they give you the shot to protect your next baby from antibodies that you build up. If you and the daddy are both negative, you can only have an rh negative child, so you don't have to worry. It's only when mom's negative and dad might be positive that they need to do anything about it.

The reason I knew my blood type to begin with was because my mother is rh negative and my father is rh positive, so they tested my blood when I was born to see if I was positive, which they said that I was. Now my tests are coming back negative. That's why I'm concerned maybe they made a mistake.

[MamaRunt]

i'm A- and my husband is O+. if you're negative they give you a rhogam shot at 26/28 weeks and if your baby is positive they give you another after you deliver. my 1st was A+ and my 2nd was A-.

[Keiko08]

I have the same factor and needed the shot at around 27 weeks, I will get another one after baby is born.

[knufrio]

Blood type is something they will NEVER EVER take your word for. You could have your blood type tattooed on your forehead and they will still test. If you have a negative blood type there is nothing to worry about with baby. Also dad does play a part because even if you are negative, if dad is positive there is a 75% chance the baby will be positive. The only time its a concern is if mom is positive and dad is negative because then baby could be negative.

[mckaylas_momma1018]

More than likely if your doctor said your Rh- then you have a negative blood type... doctor's arent the ones to test blood types... labs do... and its highly unlikely they are wrong... I've known that my blood type is A+ since I was 17 but the doctors test my blood type anyways... its all routine blood work... when I go to the hospital to deliver... they will test it again. ..

[canadiana]

We're going to find out my partner's blood type in a couple weeks, and if he's negative like me, then I don't need the shot because we can only have an rh negative baby, but if he's positive (which is statistically more likely) I will need the shot just in case we have an rh positive baby. I am just frustrated because even though it's rare, I could have weak antigens which would give me a false reading of negative, and then getting the shot would be bad for me. It would explain why my mother says that I tested as rh positive when I was a baby, but she doesn't even seem to be considering it. I guess I'll talk to her at my next appointment.

[AdeRyDk4]

I have the following factor. If you do you will get a shot around 27-28 weeks and then another after the birth of your baby. Your husband's blood type has nothing to do with it. It's just yours. If you don't know your blood type go to the blood bank or somewhere and ask them to draw your blood they can tell you. But honestly if your dr isn't worried then you may not have the right blood type. But if you do its just 2 little shots no biggie :)

[jojobeaner]

I believe it's only a problem come delivery time if your partner has a positive blood type right?

I am O-, and honestly have been pretty worried since my doctor hasn't exactly said much about it and hasn't asked questions about my husbands blood type.

He belives he does have a positive blood type so it's frustrating for sure.

Hope you get some answers (as well as I!)

[canadiana]

So my midwife seems pretty convinced that I'm actually O- and that my mom is just wrong. It's a little frustrating to me that she doesn't even think about the possibility. I'm not a doctor or anything like that, but when I looked this stuff up, there was a lot of information out there about weak D antigen...and it even says on the form they sent her that I should be retested because it was a possibility. She hasn't even mentioned it. I can't tell if she's really relaxed or lazy. Or maybe I'm just having a bad day and unreasonably pissy about this. -_-