I agree with cheescake, clomid has been known to cause
cysts in women more than
femara... it also thins the lining of the uterus and femara doesn't , however it can produce more follies than femara.. i would defintely ask your doctor! i got one cyst on femara.. well two others, but the resolved on their own, and the reason i got those was due to endo and pcos not letting my follies rupture, so then they just grew bigger into cysts!