The Compendium of Caraka 4.4.7_2

4.4.7_2

sa tathā harṣabhūtenātmanodīritaśca-adhiṣṭhitaśca bījarūpo dhātuḥ puruṣaśarīrādabhiviṣpattyocitena pathā garbhāśayamanupraviśyārtavenābhisaṃsargameti//

That primary constituent in the form of seed, thus stimulated and presided over by the self that is filled with joy, having issued from the man's body, enters the uterus through the appropriate passage and unites with the ovum.