Bhashya
यस्माच्च यज्ञ पुरुष, तस्मात् त जनयिष्यति माता यदा, तदा आहुरन्ये सोष्यतीति तस्य मातरम्, यदा च प्रसूता भवति, तदा असोष्ट पूर्णिंकेति, विधियज्ञ इव सोष्यति सोम देवदत्त, असोष्ट सोम यज्ञदत्त इति, अत शब्दसामान्याद्वा पुरुषो यज्ञ ।पुनरुत्पादनमेवास्य तत् पुरुषाख्यस्य यज्ञस्य, यत्सोष्यत्यसोष्टेति शब्दसम्बन्धित्व विधियज्ञस्येव ।किंच तन्मरणमेव अस्य पुरुषयज्ञस्य अवभृथ, समाप्तिसामान्यात् ॥
In plain words
And because a human being is a sacrifice, when a mother is about to give birth to him, people say of her, 'She will give birth,' and when she has delivered, 'She has brought forth, O Purnika'—just as in a ritual sacrifice one says, 'Devadatta will press the Soma,' or 'Yajnadatta has pressed the Soma.' Therefore, by this similarity of terminology, man is indeed a sacrifice. The regeneration of this sacrifice called man—expressed in the words 'She will give birth' and 'She has generated'—is connected through words just like a ritual sacrifice. Furthermore, his death is the concluding bath of this human sacrifice, because both share the quality of bringing things to a close.
Close to the Sanskrit
And because man is a sacrifice, therefore when the mother will bring him forth, then others say regarding his mother 'she will give birth,' and when she has been delivered, then 'she has generated, O Purnika'; just like in the ritual sacrifice 'Devadatta will press Soma,' 'Yajnadatta has pressed Soma,' hence or due to similarity of words, man is a sacrifice. The regeneration indeed of this sacrifice named man, which is 'she will give birth,' 'she has generated,' is because of the word-connection like the ritual sacrifice. Moreover, that death of this human sacrifice is indeed the concluding bath, because of the similarity of completion.