progesterone insufficiency
"I am 49 and have been on this medication for one cycle. The side effects have not been as bad as I had anticipated. I had a few mild headaches, and bit of bloating, tender breasts and a mild acne breakout, and was a bit tired a few days. I am taking it for a proliferative endometrium and after 4 days being off the medicine, I am getting a period, so it seems to be working as planned. I am taking 200 mg."