Reference for Chullin 136:16

אי עובר מאי איריא החזיר אפילו לא החזיר נמי

E if it did not withdraw it [the foetus would be permitted]! - R'Nahman B'Isaac said: It would not have been necessary to mention [the withdrawal of the hoof within] except in so far as it affects the part where it is cut off.<span class="x" onmousemove="('comment',' And the Baraitha reported by Abimi informs us that if the foetus withdrew the hoof within, one may even eat the part where the hoof was subsequently cut off, though, of course, not the hoof itself. Likewise, if the foetus withdrew its two hoofs within, one may even eat the part where each hoof was cut off.');">⁷</span>

Jastrow

Jastrow

Jastrow