3 doctors weighed in:

A Rh positive blood type?

3 doctors weighed in
Dr. William Harris
Family Medicine
1 doctor agrees

In brief: Dominant

Positive is dominant over negative.
You get one gene from each of your parents, so you are either --, -+, +-, or ++. Only in the case of -- will you have rh negative blood. With -+, +-, and ++, you will have rh positive blood. This makes rh positive blood the most common type of the two. This can be a problem with a baby: if mom is rh pos (+-), dad is rh neg (--), and baby is rh neg (--): attack!

In brief: Dominant

Positive is dominant over negative.
You get one gene from each of your parents, so you are either --, -+, +-, or ++. Only in the case of -- will you have rh negative blood. With -+, +-, and ++, you will have rh positive blood. This makes rh positive blood the most common type of the two. This can be a problem with a baby: if mom is rh pos (+-), dad is rh neg (--), and baby is rh neg (--): attack!
Dr. William Harris
Dr. William Harris
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In brief: Rh D

Rh blood group system consists of 50 defined blood-group antigens, among which the five antigens D, C, c, E, and e are the most important.
If your blood has the Rh D antigen, it is called Rh-positive if not Rh-negative. More than 85% of people are Rh positive. Problems can occur during pregnancy when the baby’s blood has the Rh factor and the mother does not, unless Rhogam is given at delivery.

In brief: Rh D

Rh blood group system consists of 50 defined blood-group antigens, among which the five antigens D, C, c, E, and e are the most important.
If your blood has the Rh D antigen, it is called Rh-positive if not Rh-negative. More than 85% of people are Rh positive. Problems can occur during pregnancy when the baby’s blood has the Rh factor and the mother does not, unless Rhogam is given at delivery.
Dr. Juan Merayo-Rodriguez
Dr. Juan Merayo-Rodriguez
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