Reference for Bekhorot 40:1

לגמריה לא אמרינן יולדת למקוטעין לסבריה אמרינן יולדת למקוטעין

According to what we have on tradition, we do not maintain that it gives birth before the due number of months is completed,<span class="x" onmousemove="('comment',' And, therefore, it does not speak of having been born in the first year.');">¹</span>

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