The Compendium of Bheḷa 4.6.1

4.6.1

iha khalu bho mātṛjaś cāyaṃ garbhaḥ pitṛjaś cātmajaś ca sātmyajaś ca rasajaś ca | asti ca sattvamaupapādakam[aupavādakam] ity ātreyavacanam | neti bharadvājaḥ | amātṛjaś cāyaṃ garbhaḥ apitṛjaś cānātmajaśca-asātmyajaś[anātmajaś] cārasajaś ca | nāsti ca sattvamaupapādakam[aupavādhikam] iti | yadi hi mātā putraṃ janyet bhūyiṣṭhaṃ hi strī putrakāmā maithunavargamabhis andhāya putraṃ janayet strīkāmā ca striyam ||

"Here indeed, sir, this embryo is born from the mother, born from the father, born from the self, born from what is wholesome, and born from chyle; and there is an spontaneously reborn mind-entity": this is the statement of Ātreya. "Not so," said Bharadvāja. "This embryo is not born from a mother, not born from a father, not born from the self, not born from what is wholesome, and not born from chyle; nor is there an spontaneously reborn mind-entity. For if a mother were to produce a son, then mostly a woman desiring a son, intending [it during] sexual union, would produce a son, and one desiring a female would produce a female.