The Compendium of Caraka 4.6.23_1

4.6.23_1

nābhyāṃ hyasya nāḍī prasaktā, nāḍyāṃ cāparā, aparā cāsya mātuḥ prasaktā hṛdaye, mātṛhṛdayaṃ hyasya tāmaparāmabhisaṃplavate sirābhiḥ syandamānābhiḥ; sa tasya raso balavarṇakaraḥ saṃpadyate, sa ca sarvarasavānāhāraḥ/

For its cord is attached to the navel, and the placenta to the cord, and the placenta is attached to the mother's heart; the mother's heart inundates that placenta through flowing vessels; that becomes its chyle, which confers strength and complexion, and that is a nutriment containing all tastes.