2,086. Bleeding for 114 Days and Still Not a Zavah

Hilchos Issurei Biah 7:11

If a woman doesn’t see blood in her niddah days or in the days after giving birth, they can be counted among her seven clean days. If she does see blood during these days, the days aren’t counted but they also don’t invalidate what she already counted. Rather, she completes her counting by adding to the days she already counted after her bleeding stops. This is because the only blood that invalidates her counting is zivah blood; other types of blood only cancel that one day.

Hilchos Issurei Biah 7:12

Once you understand all the underlying principles we have discussed, you will understand why the Sages said that a woman can see blood for 114 days in a row without becoming a zavah. This would be by bleeding for the last two days before her niddah days, followed by her seven niddah days, the two days that follow her niddah days, 14 days of labor, the 80 days following the birth of a girl, her seven niddah days and the two days that follow them. From this we see that any blood that a woman finds after completing the days of childbirth marks the start of her niddah days. We aren’t concerned with previous times when she might have had her period. Therefore, there’s a doubt as to whether a woman who found blood during twilight is a niddah, i.e., it might be as if she found blood at night, when her niddah days could begin.