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Difference in ABO
blood has no significant effect on pregnancy
but Rhesus(Rh) status is important. If Wife is Rh negative
and husband is Rh Positive pregnancy may get complicated. In these cases first pregnancy is usually uneventful but second pregnancy onwards fetus may get affected if precautions to prevent it are not taken. Anti D immunoglobulin can be given to prevent this complication. Take care.