Thanks I do try, but always learning!

Even if the study he quoted is true - they wont catch blood mixing in 72 hours if you have no reason to suspect it, which would defeat the purpose... it's all a stab in the dark. I wouldnt think it would be common though, as many rh- women do give birth without problems. I had the anti-d after my two were born and also after my first preg before Marisa. Oh the decisions!