fetal membrane 胎膜 BTO:0000473 MESH:A16.254.403 TODO - merge with extraembryonic membrane? The amnion and chorion which surround and protect a developing fetus. UBERON:0005630 adnexa fetalia uberon 围绕和保护发育中的胎儿的羊膜和绒毛膜。 待办事项-与胚外膜融合？ 胎儿附属器 extraembryonic membrane 胚外膜