Reference for Chullin 139:48

או דלמא דלאו דידיה נמי פטר

For R'Zera had raised this question (others say: R'Zera had put this question to R'Assi) : What is the law if what was left [of the womb] was more than what was gone, but the young passed through the part that was gone;<span class="x" onmousemove="('comment',' In each case the young was located in the forepart of the womb which constitutes but the smaller part of the womb; in the first case, however, only the forepart was gone but the rest remained intact, whereas in the second case only the forepart remained intact but the rest was gone.');">²²</span>

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