The Compendium of Caraka 4.3.16_1

4.3.16_1

yasmāttu samudāyaprabhavaḥ san sa garbho manuṣyavigraheṇa jāyate, manuṣyo manuṣyaprabhava ityucyate, tadvakṣyāmaḥ-bhūtānāṃ caturvidhā yonirbhavati---jarāyvaṇḍasvedodbhidaḥ/

As to why that embryo, though originating from a combination, is born with a human form, and a human is said to originate from a human, we shall explain that: the womb of living beings is of four kinds—viviparous, oviparous, sweat-born, and plant-born.