I was sure I had miscarried. To my surprise my doctor informed me, three HGC levels later, that I was indeed still pregnant and that my HCG levels were going up as expected. He was concerned that my progesterone level was 16.7 at five weeks, so he prescribed Crinone. I am not due to see my doctor for another two weeks. Crinone is a progesterone gel.
Progesterone increases endometrial receptivity to implantation of an embryo.
Once an embryo is implanted, progesterone acts to maintain the pregnancy. It is possible that you shed some endometrial tissue and by this your doctor discovered you were low on progesterone. Pregnancy without intercourse I am a virgin. Now I'm worried. My last period was several months ago, and I still haven't had one.