A Phase 2 Trial to Evaluate if Corifollitropin Alfa (Org 36286), Followed by a Low Daily Dose of hCG or Recombinant FSH Can Induce Monofollicular Growth in Women With WHO Group II Anovulatory Infertility (P05693)

Inclusion Criteria: * Oligomenorrhea (average cycle length ≥35 days and \<6 months) * Amenorrhea (average cycle length ≥6 months) * Body Mass Index ≥18 and ≤30 kg/m\^2 * Normal serum FSH levels and normal estradiol levels at screening * Progestagen induced withdrawal bleeding * Age ≥18 years and ≤39 years at the time of signing informed consent * Willing and able to sign informed consent Exclusion Criteria: * History of or current ovarian cysts or enlarged ovaries not related to polycystic ovarian syndrome (PCOS) * History of or current tumors of the ovary, breast, uterus, pituitary or hypothalamus * Less than 2 ovaries * Undiagnosed vaginal bleeding * Any ovarian and/or abdominal abnormality interfering with ultrasound examination * Malformations of the sexual organs incompatible with pregnancy * Pregnancy or lactation * Abnormal serum endocrinology levels based on screening sample * Any clinically relevant abnormal laboratory value based on screening sample * Alcohol or drug abuse within the 12 months preceding signing of informed consent * Hypersensitivity to any of the substances in corifollitropin alfa * Hypersensitivity to hCG/ Puregon® or any of its components * Previous use of corifollitropin alfa * Use of any investigational drug during 90 days before screening