This is a Phase 2, interventional, multi-center, randomized, assessor-blind, active-comparator, dose-finding study to evaluate a new investigational long-acting follicle stimulating hormone (FSH) in oligo-anovulatory women undergoing ovulation induction (OI). This study will compare 4 doses of the investigational drug versus a currently marketed drug follitropin alfa (Gonal-f ®) prefilled pen with regards to ovulation rate.