Commentary for Niddah 77:37

שינתה פעמים ליום כ' זה וזה אסורין

is to tell that she cannot establish for herself a regular period during the days of her <i>zibah</i>.<span class="x" onmousemove="('comment',' Though menstruation began on the same day in three successive months. ');">³²</span>

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