Mahabharata 13.48.42

यथैव सदृशो रूपे मातापित्रोर्हि जायतेव्याघ्रश्चित्रैस्तथा योनिं पुरुषः स्वां नियच्छति

yathaiva sadṛśo rūpe mātāpitrorhi jāyatevyāghraścitraistathā yoniṃ puruṣaḥ svāṃ niyacchati

Our plain-language meaning of this verse is waiting for scholar review.