Veset: Difference between revisions

# Consistently seeing on an earlier day of the month establishes a veset just like seeing consecutively later days.<Ref>Badei Hashulchan 189:58</ref>

# Consistently seeing on days of the month 2 days beyond the last month also establishes a veset. <Ref>Badei Hashulchan 189:58</ref>

# If a woman has a cyclical pattern of seeing on the 15th of the month, next month on the 16th, next on the 17th, then the next month jumps back to the 15th, 16th, 17th, and again 15th, 16th, and 17th, she has established a veset for that pattern.<ref>Rabbenu Chananel understood the gemara Niddah 64a that you need to see 9 times in a pattern to establish a changing veset such as the 15th of one month, then the 16th of the next month, and then the 17th of the third month, the cycle continues for another 6 months starting the fourth and seventh time again on the 15th. Tosfot disagrees with Rabbenu Chananel in the gemara. Rashba (Torat Habyait 14b) writes that even though we disagree with the Rabbenu Chananel’s understanding we still hold that his case is considered a veset. Tur and Shulchan Aruch YD 189:8 agree. Shach 189:20 holds that this pattern is established even according to Shmuel without seeing on the 18th for each series to create this pattern.</ref>  

# In fact, if a woman has a alternating pattern switching between the 15th of the month and the 16th, by seeing this switch 3 times, which is altogether 6 periods, she establishes a veset.<ref>Raavad ([http://www.hebrewbooks.org/pdfpager.aspx?req=8785&st=&pgnum=51 Baalei Hanefesh p. 53]), Taz 189:10, Shach 189:21. See there in Raavad who treats this as two separate vestot, while the Shach treats it as single cyclical pattern.</ref>

====Increasing or decreasing intervals====

# If a woman sees for a certain intervals that are increasing over time that establishes a veset. There is a dispute if three or four times is necessary to establish a veset. For example, if she sees after 30 days, then after 31, then after 32, the woman would have to consider herself as having a veset but also be strict as though she didn't have a veset.<ref>The Gemara Niddah 64a records a dispute between Rav and Shmuel regarding an increasing veset of days during the month. Rav holds that it is established with three times and Shmuel holds it is established with four times since you need four times in order to establish three increases. Tosfot s.v. itmar extends this idea to increasing intervals. The opinion of Tosfot is codified by Tur and Shulchan Aruch YD 189:5. The Shach 189:6 explains that to establish a veset of increasing intervals for Rav it would take seeing four times which is equal to three intervals and according to Shmuel seeing five times which is equal to four intervals. Taz 189:6 agrees. Shulchan Aruch 189:7 rules that we're strict for both the opinion of Rav and Shmuel. Shoshanat Haa'makim 7:2b agrees</ref>