Reference for Niddah 73:22

ת"ש בשלישית רבי אליעזר אומר

It was taught: R. Marinus ruled, A birth does not render void the previous counting after a <i>zibah</i>.<span class="x" onmousemove="('comment',' If the counting was interrupted by a birth it may be continued after the birth had taken place. ');">¹⁹</span>

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