Is it possible that a mother is O-negative and a child is O-positive? And is it true that O-negative is fairly rare?
I am asking because I am Rh-positive and my mother who is currently in hospital is RH-negative. They said in the hospital (in Germany) that Rh-negative is a rare blood group. I am confused.

O negative is around 7% for American Caucasians and I suspect it is similar in Europe and Australia. Rh positive parents can have Rh negative children, Rh negative parents cannot have Rh positive children. Rh negative is recessive just like blood type O and non-secretor. So if one parent is Rh+ and the other is Rh- they can have Rh+ offspring. They can also have Rh- as long as the Rh+ parent has a Rh- gene to offer to their offspring.

same for As, Bs and ABs

http://www.dadamo.com/wiki/wiki.pl/Rhesus_(Rh)_Blood_Group

Quoted from Captain_Janeway

Rh negative parents cannot have Rh positive children. ... So if one parent is Rh+ and the other is Rh- they can have Rh+ offspring.

Thanks CJ, that would mean my father would have been Rh+. Can't check it because he is dead .

Quoted from Captain_Janeway

O negative is around 7% for American Caucasians and I suspect it is similar in Europe and Australia. Rh positive parents can have Rh negative children, Rh negative parents cannot have Rh positive children. Rh negative is recessive just like blood type O and non-secretor. So if one parent is Rh+ and the other is Rh- they can have Rh+ offspring. They can also have Rh- as long as the Rh+ parent has a Rh- gene to offer to their offspring.

Well actually I was told on the fertility clinic that it happens  but that it is very rare

I asked because I read this and I wanted to be sure that I got a rh- donor
;
http://www.naturalbirthandbabycare.com/rhnegative.html

but when mum is Rh - a shot must be given during birth for not intoxicating the baby .... and this is ok for every b-type...not only for O's...!!!
I've a B Rh - mum ...and she lost a lot of kiddies...when havin been young...coz her hubby was an A Rh +.... but ...ok grandmas' revenge put out 2 AB's and they are still alife !!!  

Quoted from Amazone I.

but when mum is Rh - a shot must be given during birth for not intoxicating the baby .... and this is ok for every b-type...not only for O's...  

From what I read it is ok for the first child (without a shot) if the mother is RH- and the child RH+. Luckily I was a first child, else I would probably not be here.

That's right, I've had shots within the first 72hours of giving birth after my positive babies (also miscarriage) but not after my negative babies.  Also RH- females who might require a blood transfusion should bear in mind that the donated blood might be from an older female that has had a positive child and did not receive the Rhogam shot....

Quoted from shells

That's right, I've had shots within the first 72hours of giving birth after my positive babies (also miscarriage) but not after my negative babies.  Also RH- females who might require a blood transfusion should bear in mind that the donated blood might be from an older female that has had a positive child and did not receive the Rhogam shot....

That is very interesting, I did not realise that the shot is given after the birth.
I hope that the doctors know what they are doing with my mother, because she got two blood-transfusions so far. She has an operation today, which probably means more blood-transfusions.

Blood transfusions should not worry her if the blood is Rh-.   Only Rh- females who have not finished having their children should be concerned and only if the Rh- blood being received has built up antibodies from having a Rh+ baby and then not receiving the Rhogam shot.  

These days all Rh- pregnant mums are given shots throughout pregnancy whether they are carrying an Rh+ or Rh-.  I tend to think this is a result of big pharma as it is so not necessary.  As long as the new mum gets a shot within the first 72 hours and only if bub is Rh+ should suffice.  

Your mum should be fine  

Quoted from shells

Blood transfusions should not worry her if the blood is Rh-.   Only Rh- females who have not finished having their children should be concerned and only if the Rh- blood being received has built up antibodies from having a Rh+ baby and then not receiving the Rhogam shot.  

These days all Rh- pregnant mums are given shots throughout pregnancy whether they are carrying an Rh+ or Rh-.  I tend to think this is a result of big pharma as it is so not necessary. As long as the new mum gets a shot within the first 72 hours and only if bub is Rh+ should suffice.  

Your mum should be fine  

well we dont here in Denmark
and to be honest I don´t think it is neccersary or safe
- just big Pharma counting its money

Quoted from shells

Blood transfusions should not worry her if the blood is Rh-.   Only Rh- females who have not finished having their children should be concerned and only if the Rh- blood being received has built up antibodies from having a Rh+ baby and then not receiving the Rhogam shot.  

These days all Rh- pregnant mums are given shots throughout pregnancy whether they are carrying an Rh+ or Rh-.  I tend to think this is a result of big pharma as it is so not necessary.  As long as the new mum gets a shot within the first 72 hours and only if bub is Rh+ should suffice.  

Your mum should be fine  

Thanks a lot, shells, that is reassuring.

Rh negative mothers can't have Rh positive children??? Umm...ok...

I'm pretty sure my mom told me she was A-, because I'm A+ (at least, according to the Red Cross, I am). Seems I remember her mentioning that she had to get the Rhogam shot.

Also, my father is Rh positive. When I was born, I had jaundice and anemia...both typical of Rh+ children born to an Rh- mother and Rh+ father. Mom was also anemic (she ate a poor diet during pregnancy, though).

Rh negative parents, i.e. where both mother and father are Rh negative they cannot have Rh positive children

Quoted from koahiatamadl

Rh negative parents, i.e. where both mother and father are Rh negative they cannot have Rh positive children

Now THAT makes more sense.