I took it with my frozen egg transfer cycles. It increases the lining of the uterus and makes it nice for the eggs to transplant. May not happen to you but beware --I became the biggest b___h when taking it , the first time I blew up at my best friend and the second time my mother.
It's estrogen.. Your numbers have to at a certain level before the transfer. Same side effects as the b/c. Bloating, etc.. Maybe not as bad..