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The baby actually has the ability to be positive or negative for the Rh trait depending on if the mother's genotype. If her genotype is Rh+Rh+ then the baby will be Rh+Rh- and positive for Rh, however if the mother is Rh+Rh- then there is a 50% chance the baby will be positive (Rh+Rh-) and a 50% chance the baby will be negative (Rh-Rh-).

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14y ago
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13y ago

If a Rh- mother has a Rh+ husband then they have a chance for their babies to have Rh+ blood. If this happens the mother can form antibodies against the blood in the fetus.

This is not usually a problem in the first pregnancy since the mother's blood is normally kept separate from the baby's blood until delivery, at which time their blood comes in contact. So the mom starts to make antibodes but the baby is already delivered, so there is no adverse effect. The problem comes along when baby #2 comes along. If this baby is also Rh+, then the mom may already have formed antibodies against the blood in the fetus. This can cause a disease called hemolytic disease of the newborn and could lead to the death of the fetus.

All Medical Answers need confirmation and re-confirmation.

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13y ago

there is an important concept that should be understood here :

when a woman is pregnant ( Rh-ve blood type), if her husband is (Rh-ve) , there is no problem with that and their babies will be ((Rh-ve))

But when woman is Rh-ve and her husband Rh+ve, here comes the problems, because Rh+ve is more dominant than the -ve, kids will be ((Rh+ve))

so --> when a woman give birth for the 1st child she should have special injection for this situation, because as soon as the delivery comes the blood of baby will spread and mix with the mother's blood through Placenta, since both blood types are different (+ve,-ve), this injection should be given immediately to mother in order to kill the antibodies that came from baby's blood.

if this injection is not taken within hours of delivery, antibodies will stay in mother's blood for life, because this action cannot be reversed, there is no dangerous on the 1st baby,the complications comes when mother give birth to the second baby, because the antibodies are still in her blood, they will start to fight against baby's +ve blood type and cause hemolysis ( break down of blood cells ), mental retardation, and then death.

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12y ago

WEll Imma Say Well Dat da dad gots to have a different rh factor tso da bay bay wil will be good

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Q: What happens when mom is Rh- negative and dad is Rh positive and the second child?
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Can a b positive and a positive have a b negative child?

No. If both parents are positive, the child will be positive. If both parents are negative, the child will be negative. Parents who are negative and positive can have children who are either positive or negative. '+' + '+' = '+' '-' + '-' = '-' '+' + '-' = '-' or '+'


What happens if a woman is heterozygous Rh positive and her child's father is hemozygous Rh negative?

There is a 50% that offspring will be Rh negative.


Why would there be cause for concern if a young pregnant mother is Rh negative her husband is Rh positive and this is their second child?

Their children have a 50/50 chance of being Rh Positive. If they have an Rh negative first child, there will be no problems with the second child (with Rh groups).There might be a problem if the first child was Rh positive. It is quite likely that during the delivery the child's blood mixed with the mothers. The mother would then have began producing Rh positive antibodies. This means that if the second child is also Rh positive - the antibodies will 'attack' the fetus.


Can parents that are both a negative have an ab positive child?

No. If both parents are A negative the child can only be A negative or O negative. If the child is AB positive at least one parent must have type B or AB blood and at least one must be RH positive.


Can parents with both negative blood parent a positive child?

absolutely. as long as one of the parents is positive, the child can be positive. and if one parent is A the other B, the child can be A, B, AB or O depending on the parents' other alleles. so the child can definitely be A or B positive, but also A negative, B negative, AB negative, AB positive, O positive or O negative.

Related questions

Can a b positive and a positive have a b negative child?

No. If both parents are positive, the child will be positive. If both parents are negative, the child will be negative. Parents who are negative and positive can have children who are either positive or negative. '+' + '+' = '+' '-' + '-' = '-' '+' + '-' = '-' or '+'


What happens when an o positive man and o positive woman have children?

the child has o negative blood


What happens if a woman is heterozygous Rh positive and her child's father is hemozygous Rh negative?

There is a 50% that offspring will be Rh negative.


Can an o positive father and a b negative mother have a child with a positive?

No. They can have an O positive, an O negative, A B positive, or a B negative child.


Why would there be cause for concern if a young pregnant mother is Rh negative her husband is Rh positive and this is their second child?

Their children have a 50/50 chance of being Rh Positive. If they have an Rh negative first child, there will be no problems with the second child (with Rh groups).There might be a problem if the first child was Rh positive. It is quite likely that during the delivery the child's blood mixed with the mothers. The mother would then have began producing Rh positive antibodies. This means that if the second child is also Rh positive - the antibodies will 'attack' the fetus.


What happens when blood group of father is O positive and mother is B negative of an unborn child?

The child may have either O or B blood type, assuming that the mother has a recessive allele for O blood type. A child of parents with both positive and negative Rh factor may have either. So, the child could have O positive, O negative, B positive, or B negative blood types.


Is peer pressure always a negative or bad thing?

Peer pressure can be both negative and positive. Negative peer pressure can lead individuals to engage in harmful behaviors to fit in with a group, while positive peer pressure can influence individuals to make healthy choices or pursue productive activities. It's important for individuals to evaluate the influence of their peers and make decisions that align with their own values and goals.


Negative pregnancy test but urinated on it again and it went positive?

This happened to me when I got pregnant with my third child. The first test was negative and the second positive. From what I understand, a pregnancy test can give a false negative but rarely gives a false positive.


Can o negative and b positive have a an a negative child?

No. The child would be either type O or B, and either rH negative or positive.


Can o positive father and a positive mother have a negative child?

if your child is negative, i would ask for a blood sample from the mailman


If two parents have A-negative and O-negative bloodtypes is it possible for their child to be A-positive?

No. Two rhesus-negative parents cannot have a rhesus-positive child.


Can a O negative and a B positive can give birth to a child?

of course. if mother is negative and father is positive, even no harm of first issue. but for second issue, it is necessary to inject anti-d.