Reference for Niddah 52:38

אמר ליה שמואל

In the meanwhile he approached them. What, said Samuel to him, did Rab rule in regard to a placenta? — Thus, the other replied, said Rab: The placenta may be attributed only to a child that is viable.<span class="x" onmousemove="('comment',' As suggested supra by R. Kahana and confirmed by R. Isaac. ');">³⁵</span>

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