Can A Baby Have Positive Blood Group While Parents Have Negative?

Posted on Sat, 12 Jan 2013

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Sat, 12 Jan 2013 Answered on

Mon, 28 Jan 2013 Last reviewed on

Question : if both parents have negitive blood type, and the first two children have negitive blood type, what are the chances of the third child have positive blood type?

Answered by Dr. Nsah Bernard (2 hours later)

Hi,

When discussing "negative blood type," I'm assuming you're referring to Rhesus (Rh) negative. If both parents are Rh-negative, their children will always be Rh-negative as well; there's no possibility of them having an Rh-positive child.

But it shall be appropriate for their children, especially the female children to always signal that they are rhesus negative. This is because, in case they get married to rhesus positive husbands, if appropriate precautions are not taken, their children, especially during the second pregnancies might be affected if appropriate medical measures are not considered.

Also, always tell your physician, because this could be important, if any of them, rhesus negative individuals have ever been exposed to rhesus positive blood blood.

As far as the chances of having a rhesus positive child if they are both rhesus negative, its impracticable.

Thanks,
Nsah, MD.

Note: For detailed guidance on genetic screening consult a genetics specialist

Above answer was peer-reviewed by : Dr. Shanthi.E