A randomized trial comparing the ovulation induction efficacy of clomiphene citrate and letrozole.

Background: Letrazole is an aromatase inhibitor, which is useful in ovulation induction. However, evidence on its efficacy over clomiphene citrate, which is the first of drug used for therapy of anovulation, is insufficient in Indian patients.

Aims: To compare the efficacy of letrozole and clomiphene citrate in attaining optimal follicular growth.