noun
gestational sac; fetal sac
Medical term used in obstetrics and gynecology to refer to the sac containing the embryo/fetus during early pregnancy.
超音波検査で胎嚢が確認された。
A gestational sac was confirmed on ultrasound.
Compound of 胎 (fetus, womb) and 嚢 (sac, cyst). A Sino-Japanese medical term.