Reference for Chullin 139:43

הא אפיקתיה

Then there is no womb here at all!<span class="x" onmousemove="('comment',' It being assumed that the womb was gone before the young emerged, in which case there is no doubt at all that it is not holy as a firstling.');">¹⁹</span>

Jastrow

Jastrow