Reference for Chullin 139:44

אלא

It means: What if the walls of the womb were torn away and it now rested on the neck of the young?<span class="x" onmousemove="('comment',' During a difficult delivery the young had wrenched away the entire womb of its dam and had emerged with it upon its neck.');">²⁰</span>

Jastrow

Jastrow