By Sarene Leeds, Oct 11, 2023

“An anembryonic pregnancy occurs when a fertilized egg successfully attaches itself to the uterus, yet the subsequent embryo fails to progress in development,” explains Layan Alrahmani, M.D., a board-certified OB/GYN and maternal-fetal medicine specialist. This results in a pregnancy where the undeveloped embryo is resorbed, leaving behind an empty gestational sac, or, in other words, “retained embryonic/placental tissue in the uterine cavity,” says Kecia Gaither, M.D., a board-certified OB/GYN and Director of Perinatal Services/Maternal Fetal Medicine at NYC Health + Hospitals in the Bronx, New York. 

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