[silverlife]

I did a quick search, and what I was thinking of was another type of Rh sensitivity besides what Rhogam protects against. My daughter is Rh negative as well, so that shouldn't be the issue (or at least I didn't develop a sensitivity in her pregnancy and a sensitivity didn't cause her anemia).

My son is Rh+, so I suppose it's possible that I developed this other sensitivity then, it didn't affect my daughter, but maybe these last two babies were Rh+?

The test results just said "antibody screen -- negative", it didn't say if it was only testing for RhD (the most common type of Rh incompatibility) or if it tested for all of them.