The Compendium of Bheḷa 4.8.1

4.8.1

iha khalu bhoḥ yāḥ striyaḥ pathyalaghubhojinyo ' nudāvartanaśīlā apraduṣṭā yathāgarbhāśayāḥ suviśuddhasrotaso bhavanti, tā ācakṣate avandhyāḥ iti kuśalāḥ | tā iṣṭarūpaṃ medhāvi cāpatyaṃ janayanti, viparyaye viparyayaḥ ||

In this matter, sir: those women who eat wholesome and light food, who are not given to upward movement of wind, whose internal organs including the womb are unvitiated, and whose channels are thoroughly purified, are called fertile by the experts. / They give birth to offspring of desirable form and intelligence; in the reverse case, the reverse occurs.