Reference for Niddah 84:12

וכי ההוא דאתא לקמיה דרבא אמר ליה

— The statement is justified in a case for instance, where the embryo put its head out of the ante-chamber;<span class="x" onmousemove="('comment',' And then draw it back (cf. Strashun). Although the head is now within (internal) the woman is unclean as if the embryo had actually been born (external). ');">¹²</span>

Jastrow

Jastrow