IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-3-33934 Original Research Paper A prospective study to compare the efficacy of letrozole and clomiphene citrate in ovulation induction in polycyctic ovarian syndrome with clomiphene resistance Kavita Dr. Dr K Manju Dr. March 2021 10 3 01 02