A member asked:

Im rh negative. i had a threatened miscarriage at 6wks and i'm 21wks now. i was never given the shot. should i go to the hospital and request it?

A doctor has provided 1 answer

No: No, Rhogam is most effective within 72 hours of an event where an RH- mother's blood may come into contact with RH+ fetal blood. This late it would have no effect. If it's known for sure that the baby's father is RH- also, then Rhogam could be withheld because it is not possible for 2 RH- parents to have an RH+ baby, so there would be no chance of sensitization to RH+ blood.

Answered 2/4/2016

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