Comparison of the pregnancy outcomes of progestin-primed vs. antagonist ovarian stimulation in patients with poor ovarian response: a retrospective study

Objectives Progestin-primed ovarian stimulation (PPOS) is an efficient controlled ovarian stimulation (COS) method. The study explored the pregnancy outcomes between PPOS and antagonist ovarian stimulation protocol (GnRH-ant) in infertile patients with poor ovarian response (POR).