The Compendium of Caraka 4.3.16_3

4.3.16_3

tatra jarāyujānāmaṇḍajānāṃ ca prāṇināmete garbhakarā bhāvā yāṃ yāṃ yonimāpadyante, tasyāṃ tasyāṃ yonau tathātathārūpā bhavanti; yathā---kanakarajatatāmratrapusīsakānyāsicyamānāni teṣu teṣu madhūcchiṣṭavigraheṣu, tāni yadā manuṣyabimbamāpadyante tadā manuṣyavigraheṇa jāyante, tasmāt samudāyaprabhavaḥ san garbho manuṣyavigraheṇa jāyate; manuṣyaśca manuṣyaprabhava ucyate, tadyonitvāt//

There, among viviparous and oviparous creatures, into whichever womb these embryo-forming factors enter, they take on shapes corresponding to that womb; just as gold, silver, copper, tin, and lead, when poured into various wax molds, take on the form of a human when they enter a human mold, so the embryo, though originating from a combination, is born with a human form; and a human is said to originate from a human because of having that womb.