EditorialGuo Meiyan and her husband before an in vitro fertilization procedure (IVF) at Beijing Perfect Family Hospital, on Nov. 23, 2022. (Andrea Verdelli/The New York Times)
EditorialNathalie Carpenter, who used an endometrial receptivity analysis ahead of two in vitro fertilization cycles, in Old Greewich, Conn. on Nov. 30, 2021. (Yehyun Kim/The New York Times)