Hey mamas, just got my first trimester blood tests done. I reviewed them all and all were fine except my antibody screen. In my past four pregnancies it was always neg. But with this one it came back positive. So I'm wondering if anyone has had this happen to them? What exactly does it mean. I am O- blood type with the obvious Rh negative factor. My husband is A- so there shouldn't be any transfer of antibodies that way. Any info would help! Thanks!!!