Sampasadaniyasutta 5.6

5.6

Puna caparaṃ, bhante, idhekacco sampajāno mātukucchiṃ okkamati; sampajāno mātukucchismiṃ ṭhāti; sampajāno mātukucchimhā nikkhamati. Ayaṃ catutthā gabbhāvakkanti.

Furthermore, someone is aware when conceived in their mother’s womb, aware as they remain there, and aware as they emerge. This is the fourth kind of conception.