The Compendium of Bheḷa 4.8.2

4.8.2

ṛtau ca garbho ' vatiṣṭhate | tad yathā---sukṛṣṭakṣetre bījaṃ prakṣiptaṃ tatra vrīhiḥ vrīhitvāya kalpate, yavo yavatvāyaevam eva[priya] indriyamṛtukāle visṛṣṭamaduṣṭāyāṃ[-māmaṭṭa] yonau garbhāśayam upagacchati | tad yathā[tad yathāya]---āvartagṛhītāḥ pratīpaṃ pratidhāvanti tadvat śuklaśoṇitaṃgarbhāśaye[garbhāśaya astikaṃ] āsiktaṃ kṣīramiva | taccānekakanakamiva[taṃ cānekanakamivo]-udumbareṇa niṣiktamekatvamāpannamṛddhiṃ labhate ||

And the embryo is established during the fertile period. Just as seed cast into a well-plowed field results in vrīhi rice becoming vrīhi rice and barley becoming barley, even so, semen emitted at the fertile period into an unvitiated yoni reaches the womb. / Just as those caught in a whirlpool rush counter to the current, so the semen and blood poured into the womb are like milk; / and just as diverse gold poured together with an udumbara [crucible] becomes one, it attains development.