In this study,the investigators compared two protocols for controlled ovarian
hyperstimulation in infertility patients requiring IVF. In the control group, the patient
undergoes a standard antagonist protocol. In the study group, the administration of
gonadotropins is stopped in the late follicular phase and replaced by low dose human
chorionic gonadotropins. The primary endpoint of the study is the number of oocytes retrieved
in both groups.