True about clomiphene citrate is:
Clomiphene citrate :

Clomiphene citrate is the first line intervention for medical induction of ovulation in almost all circumstances, clomiphene acts purely as an antagonist or antiestrogen.
Enclomiphene has antiestrogenic affect
Chance of pregnancy is three fold as compared to placebo
Risk of multiple pregnancy is 2-4%
It can also be used for male infertility with oligozoospermia