I had a physiological 3rd stage with DD3. I had to sign a consent form declining the synto. I had synto during labour and the MW turned it off as soon as she was out. I delivered the placenta 15 minutes later while I was trying to attach DD. I told the Ob when I asked for a physiological 3rd stage that there was no point in giving me the synto if BFing would do the same thing and I was only cutting the cord because I wasn't sure that I could effectively care for the placenta with the way my pelvis was. She just told me what to look for WRT infections and told me that if I had more bleeding than I had with the older 2 to let the MW know. I bled LESS this time than with the other 2!!

As soon as the placenta arrives the MW is supposed to check it over and make sure it is complete. They should know pretty quickly if you have retained any.