<prompt> Non steroidal anti hormonal substance used to induce ovulation:MifepristoneClomiphene citrateTamoxifenRaloxifen  <response>: Clomiphene citrate is used for ovulation induction. Dose- 50mgday staingfrom day 2 to day 6 of the cycle for 5 days. Clomiphene citrate is nonsteroidal triphenylethylene derivative that demonstrates both estrogen agonist and antagonist propeies. Williams textbook of gynaecology 3rd edition page 451 