The locus classicus for discussions of the womb-gate was Zhang Ji (fl. 196-219), whose writings on “cold damage disorders” and pharmacology had become a pillar of learned medicine during the Northern Song (960-127).
wombgate
علم أصول الكلمات
() From womb + gate. In later use sometimes translating Mandarin e.g. 胞門 (bāomén).