The Compendium of Caraka 4.3.15

4.3.15

bharadvāja uvāca---yadyayameṣāṃ nānāvidhānāṃ garbhakarāṇāṃ bhāvānāṃ samudāyādabhinirvartate garbhaḥ kathamayaṃ sandhīyate, yadi cāpi sandhīyate kasmāt samudāyaprabhavaḥ sam garbho manuṣyavigraheṇa jāyate, manuṣyaśca manuṣyaprabhava ucyate; tatra cediṣṭametadyasmānmanuṣyo manuṣyaprabhavastasmādeva manuṣyavigraheṇa jāyate, yathā-gaurgoprabhavaḥ, yathā-cāśvo 'aśvaprabhava iti; evaṃ sati yaduktamagre samudayātmaka iti tadayuktam/

Bharadvāja said: If this embryo is produced from the combination of these manifold embryo-forming factors, how is it assembled? And even if it is assembled, why is that embryo, originating from a combination, born with a human form, and why is a human said to originate from a human? If it is accepted there that because a human originates from a human, therefore he is born with a human form—just as a cow originates from a cow, and just as a horse originates from a horse—this being so, what was said earlier, that it is comprised of a combination, is incorrect.