Progestin-primed ovarian stimulation (PPOS) in preimplantation genetic testing for aneuploidy: a retrospective study and meta-analysis - Qin, Xi; Fan, Li; Luo, Yuxing; Deng, Zhibing; Zeng, Zhonghong; Jiang, Xiaoling; Yang, Yihua (Archives of Gynecology and Obstetrics, 2025)