A.M.
Hi H.,
I have been told as long as progesterone is 10 or above you should be fine. They put on on PG to ensure is stays high enough for your little one. I was put on PG for my daughter who was born in August 07. She is happy and healthy! We have been very blessed. I would say if the gestational sack is the size it should be you should be on the right track. That is great your doctor recognizes the need to be on PG.
Best to you and your little one!
A.