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1. The Gemara explains how being in a state of fear and being suddenly frightened have opposite effects on a woman with regard to Nidah.
2. The Mishnah discusses Nidah blood that was emitted immediately after a woman died.
3. Zeiri explains why the Tana Kama says that such blood is considered Nidah blood.
4. Originally, a woman who saw Tahor blood was allowed to pour the water that was used to wash the Korban Pesach.
5. There is a dispute about whether a woman who finishes her Tahor days must immerse in order to eat Terumah.
A BIT MORE
1. When a woman is in a constant state of fear (for example, she is in hiding from an enemy), it causes her to miss seeing her period. However, if a woman is suddenly frightened, it can cause her to mentstruate unexpectedly.
2. Tana Kama: If she emitted a Revi'is of blood, it causes Tum'ah of Nidah blood and causes Tum'as Mes in the room it is in (as long as the blood is all in the same place). Rebbi Yehudah: It is not considered Nidah blood, since it flowed out only after she died.
3. The Tana Kama understands that even if the blood did not start to flow out while she was alive, it still is Nidah blood as long as it was in the Mekor when she was alive.
4. However, they later declared that she is like a person who touched a Tamei Mes (Beis Hillel) or a Tamei Mes herself (Beis Shamai) regarding Kodshim, and therefore she may not do so.
5. While all agree that she must immerse in order to eat Kodshim, Beis Hillel maintains that this is not necessary in order for her to eat Terumah. Beis Shamai argues that it is necessary for her to eat Terumah as well.
Next Daf Index to Revach for Maseches Nidah