Commentary for Niddah 42:35

כסומכוס וקילא מכולהו

why then did it say, 'In her flesh'? Both rulings may, therefore, be deduced. But did not R. Johanan rule in the name of R. Simeon b. Yohai: If a woman aborted a shapeless object it must be split, and if there was in it a quantity of accumulated blood she is unclean, otherwise she is clean?<span class="x" onmousemove="('comment',' Supra. Now if the blood in the abortion causes uncleanness why should not also blood in a tube? ');">²⁹</span>

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