अथ यामिच्छेद्दधीतेति तस्यामर्थं निष्ठाय मुखेन मुखं संधायापान्याभिप्राण्यात् ।इन्द्रियेण ते रेतसा रेत आदधामीति ।गर्भिण्येव भवति ॥६,४.११ ॥
In plain words
Now he who wishes, "May she conceive" — having united with her and joined mouth to mouth, let him breathe out and then breathe in, saying, "With vigour, with seed, I place seed in thee." And so she comes to be with child.