Study Niddah folio 9B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
It is any woman who is old enough that people call her: Mother [Imma], Mother, and she is not embarrassed. R' Zeira and R' Shmuel bar Rav Yitzḥak disagree with regard to this matter. One says that the definition is any woman who does not take offense about being called: Mother, Mother. And the other
The Talmud asks: And how long is a typical menstrual cycle? Reish Lakish says in the name of R' Yehuda Nesia: The average menstrual cycle is 30 days long. And Rava says that Rav Ḥisda says: It is 20 days. The Talmud notes: And they do not disagree. One Sage, Rav Yehuda Nesia, counts all the days
§ A baraita states: With regard to an elderly woman for whom 3 typical menstrual cycles of 30 days passed and then she saw a discharge of menstrual blood, her time is sufficient. And if a further 3 typical menstrual cycles of 30 days passed for her and she subsequently saw a discharge of menstrual b
The baraita continues: And it is not necessary to teach this halakha in a case where she experienced the 3 sightings in even intervals of 90 days, as in such a case it is obvious that she assumes the status of a normal woman who transmits impurity retroactively. Rather, even if she had intervals whe
The Talmud infers: The wording of the baraita: Even if she had intervals where she decreased, indicates that it is not necessary to teach the halakha in the case of a woman who experienced bleeding at even intervals. This is puzzling, as on the contrary, if she experienced bleeding at even interval