Reference for Niddah 57:42

רבי יוסי אומר

where it issued in the normal manner in a condition of viability.<span class="x" onmousemove="('comment',' But not where the embryo issued in pieces when it cannot possibly live. In such a case the issue of the head constitutes no valid birth. ');">³⁷</span>

Jastrow

Jastrow

Jastrow

Jastrow