Any mixing of maternal and fetal blood (subchorionic hematomas, abruptions, etc) can produce antibodies against future pregnancies if the parents are of certain blood types (with an Rh- mother)… if my wife had ever needed Rhogam, I would have encouraged her to take it 100%.

If you really wanted to avoid it you could have the father’s blood type checked. Only have 1-2 days to figure it out tho.

Any mixing of maternal and fetal blood (subchorionic hematomas, abruptions, etc) can produce antibodies against future pregnancies if the parents are of certain blood types (with an Rh- mother)… if my wife had ever needed Rhogam, I would have encouraged her to take it 100%.