I'm O neg as well and had anti-D which as the others said you have twice during your pregnancy and if your baby is born with a positive blood type you have another injection after the birth (I think within 12 hours of giving birth). My DD is O+. Don't know what DH's blood type is but it's obviously some kind of positive type and that's where DD got the positive from I guess.
I find it all very interesting how it works. Like my mum is O+ and my dad is AB-. My sister is the exact same type as my dad but I got the O from mum and the negative from dad.
You don't need Anti-D if the father of the baby is negative as well. DH is O neg and I am A neg so I have not required Anti-D for any pregnancy / bleeding / miscarriage / stillbirth / delivery. It is a blood product and it does have risks that need to be explained to you before administration but the benefits outweigh the minimally small risks if the mother is negative and the baby is positive.
Danni - Dad is A-, and so am I and my girls. DH is O+.
I confirmed what Michelle said with my MW in my last pg, which is how I managed to talk DH into donating blood. Many Hospitals will try to push it on you even if your DH is the same type because sometimes they dont believe that you have been faithful to DH, or they dont believe DH's blood type unless they have it on their records. If your DH is also a negative blood type you do not need to have the Anti-D. I would recommend finding out his blood type, Pg women are pin cushions enough!!
I'm A- and it's really no big deal, just a couple of small injections before birth and one after if bubs is + type . I don't think it affects this baby just if you are planning on another and somehow antibodies from this bub get into your system then the next bub with a + type will likely be rejected by your body. This is my 3rd bub and have had no problems with anything, I'm sure your MW or Dr will explain everything to you next visit.
we are in the process of finding out DHs blood type for this exact reason. Obs said if he is negative they wont be giving me the injection. funny thing is thouh i had to bring it up with them myself. during first pregnancy i didnt realise that i didnt HAVE to have it if DH was negative and no one told me othewise and so after reading that i asked this time around. it is made from human blood donations and so even though they treat it for certain viruses etc they cant 100% gurantee its safety.
There are 4 different blood groups in the ABO system; A, B, AB and O
There are 2 different blood groups in the Rhesus Factor system; Positive and Negative
This gives a total of 8 different combinations; A+, A-, B+, B-, AB+, AB-, O+, O-
You get one gene in the ABO system from your Mum and one from your Dad.
You get one gene in the Rhesus system from your Mum and one from your Dad.
For the Rhesus Factor, the gene for Rhesus positive is dominant to the gene for Rhesus negative. This gene gives you Rhesus antigens on the surface of the cell. So, if you have one positive gene and one negative gene, you will be Rhesus positive because the positive gene will be making the antigens. One positive gene, One negative gene= Rhesus positive
Two positive genes = Rhesus positive
Two negative genes = Rhesus negative
The ABO system is a little different because you can have both A and B antigens on the cell at one time. The genes for these antigens are considered co-dominant. If you have no antigens on the cell, you have O blood group. O is recessive.
One A gene + One O gene = AO = A blood group
Two A genes = AA = A blood group
One B gene + One O gene = BO = B blood group
Two B genes = BB = B blood group
One A gene + One B gene = AB = AB blood group
Two O genes = OO = O blood group
A parent who is AB blood group has one A gene and one B gene that they can pass on. If they pass on the A, they could have a child who is AA, AO of AB depending on what the other parent contributes.
If a Mum is Rhesus negative, (has two negative genes, and no Rhesus antigens on their cells) and has a partner who is Rhesus positive (two Rhesus positive genes OR one positive and one negative gene), their child may have antigens on their blood cells (if they inherit the positive gene from Dad).
If the baby has antigens on their blood cells, and these go into Mum's blood, Mum's blood can make Antibodies to the Antigen. Antibodies don't harm Mum, but if she has another baby that is Rhesus positive, Mum's antibodies will increase and these can cross the placenta and damage the baby's blood cells. It is to avoid this potential, that Rhesus negative Mums (with rhesus positive partners) are given the Anti-D injection.
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