Cakradatta (Cikitsasangraha) 61.33

61.33

samadivase śubhayoge
dakṣiṇapārśvāvalambinī dhīrā .
tyaktastryantarasaṅga-
prahṛṣṭamanaso'tivṛddhadhātośca .
puruṣasya saṅgamātrā-
llabhate putraṃ tato niyatam .. 33 ..

On an even day, under an auspicious astrological conjunction, / lying on her right side, composed, / upon copulation merely with a man who has abstained from intercourse with other women, / whose mind is joyful, and whose semen is exceedingly increased, / she then invariably obtains a son.