अथ यामिच्छेन्न गर्भं दधीतेति तस्यामर्थं निष्ठाय मुखेन मुखं संधायाभिप्राण्यापान्यात् ।इन्द्रियेण ते रेतसा रेत आदद इति ।अरेता एव भवति ॥बृह. ६,४.१० ॥
In plain words
Now he who wishes, "May she not conceive" — having united with her and joined mouth to mouth, let him breathe in and then breathe out, saying, "With vigour, with seed, I take the seed from thee." And so she comes to be without seed.
The commentators
Bṛhadāraṇyakopaniṣadbhāṣyam· bhāṣya
अथ यामिच्छेत्- न गर्भं दधीत न धारयेत् गर्भिणी
In plain words
If a man wants a woman not to conceive — not to carry a child at all — pregnant...
Close to the Sanskrit
Now, if he should desire that a woman [should] not conceive a child — should not carry it — pregnant... …