What are the possible blood groups and Rh of the baby, and is there a risk?

What are the possible blood groups and Rh of the baby, and is there a risk?

Now let us see, what are the possible blood groups and Rh of the baby, and is there a risk.

Mother: O− (Rh-negative)

Father: B+ (Rh-positive)

1. Baby ABO (A, B, O) group

Mother group O, meaning she does not carry any A or B antigens.

Father group B, meaning she carries B antigens.

So, the baby blood group can be —

B group (getting B from the father), or

O group (if the father carries the “O” gene)

That is, the baby ABO group will be either O or B.

2. Baby Rh factor (+ / -)

Mother Rh-negative (meaning she does not have the Rh protein)

Father Rh-positive (meaning he has the Rh protein)

As a result, the baby Rh can be —

Positive (+) (if she gets the Rh gene from the father)

Negative (−) (if she does not get the Rh gene from the father)

3. Where is the risk

If the baby is Rh-positive, and the mother is Rh-negative →

Then Rh incompatibility may occur.

There is a risk of problems in the next pregnancy (not the first time).

Solution

There is no fear in this situation if the following rules are followed:

One dose of Anti-D injection (Rh immunoglobulin) should be taken at 28 weeks of pregnancy.

Another dose should be taken within 72 hours of delivery, if the baby blood is Rh-positive.

Anti-D is also given if necessary in case of miscarriage, hemorrhage, or other medical conditions.

Summary of results

Mother blood O−

Father blood B+

Child blood: B+ / B− / O+ / O− (all possibilities)

Risk: Only if the baby is Rh-positive

Prevention: It is safe to take Anti-D injection