True about clomiphene citrate is:
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
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.