Zarei, Afsoon, et al. “ Effects of Letrozole in Prevention of Premature Luteinizing Hormone (LH) Surge in Infertile Women With Clomiphene Citrate Resistant Polycystic Ovary Syndrome (PCOS) Undergoing Intrauterine Insemination: ”. Galen Medical Journal, vol. 4, no. 3, June 2015, p. e232, doi:10.31661/gmj.v4i3.232.