AUTHOR=Chen Qiuju TITLE=Editorial: Recent advances in progestin-primed ovarian stimulation JOURNAL=Frontiers in Endocrinology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2022.1004352 DOI=10.3389/fendo.2022.1004352 ISSN=1664-2392