In Jewish ritual law, a zavahis a woman who has had vaginal blood discharges not during the usually anticipated menstrual cycle, and thus entered a state of ritual impurity. A man who has had similar abnormal discharge from his genitals is known as a zav. In the realm of tumah and taharah, the zavah has the ability to create a midras, and to make unclean for a seven-day period - a man who conducts sexual intercourse with her. Additionally, the zavah and her partner are liable to kareth for willfully engaging in forbidden sexual intercourse.
Torah sources for the zavah are sourced in the book of Leviticus. According to textual scholars, the regulations concerning childbirth, which have a similar seven-day waiting period before washing, and the sin and whole offerings, were originally suffixed to those concerning menstruation, but were later moved. Although the zavah regulations clearly have a sanitary benefit in the light of modern medical knowledge, Biblical scholars see these regulations as having originally derived from taboos against contact with blood and semen, because they were considered to house life and were consequently considered sacred; the seven-day period is thought to exist to ensure that the abnormality has genuinely ceased, the sin offering is considered to have originally been made as an apology for violating the taboo.
According to the Jerusalem Talmud, the eleven-day period between each menstrual cycle is Halakha LeMoshe MiSinai. This has been explained by Maimonides to mean that seven days are given to all women during their regular monthly menstrual cycle, known as the days of the menstruate, even if her actual period lasted only 3 to 5 days. From the eighth day after the beginning of her period, when she should have normally concluded her period, these are days that are known in Hebrew as the days of a running issue, and which simply defines a time that, if the woman had an irregular flow of blood for three consecutive days during this time, she becomes a zavah and is capable of defiling whatever she touches, and especially whatever object she happens to be standing upon, lying upon or sitting upon.
''Zavah ketanah''
The woman, within an eleven-day window of the completion of her base seven-day niddah period notices an abnormal blood discharge. This one time discharge deems her a zavah ketanah and brings the requirement for her to verify that the next day will show no discharge. Provided the next day is clean, her immersion in the mikveh prior to sunset makes her tahor after sunset.
''Zavah gedolah''
In the zavah gedolah scenario, the woman, within an eleven-day window of the completion of her base seven-day niddah period notices an abnormal blood discharge. If the next day another discharge is noticed, followed by yet another discharge on the third consecutive day, she is deemed a zavah gedolah. She is then required to count seven clean days, immerse in a mikveh on the seventh day and bring a korban on the eighth.
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Other laws
A female must be at least ten days old to be eligible for zavah status. According to the Talmud, the law of zavah is applicable if the discharge in question had happened three times over three consecutive days. The Sifra stipulates that the zavah is required to immerse in a spring to obtain taharah. The zavah is commonly known as one of four types of tumah that are required to bring a sacrifice post the purification process. The korban consists of both a sin offering and a whole offering, each involving a dove.
reasons that the zavah gedolah state is a divine consequence to alert the woman from acting in a manner comparative to Chava. This unpleasant consequence is implied by God's message to Chava in the verse "I will increase and multiply your discomfort", with the seven-day waiting period intended to allow a spirit of repentance and purity to enter her will. Her bringing of a dual sacrifice, the Chatat and Olah, are to rectify her negative action and thought, respectively. Targum Yonathan describes the zavah state as a divine consequence to a woman who neglects the requirement to take adequate precautions involving the laws and nuances of menstrual impurity.
In modern Judaism
Due to the destruction of the Temple in Jerusalem, Judaism regards the sacrificial regulations as being in abeyance; rabbinical tradition subsequently differentiated less between the regulations of zavah and those for niddah. In Orthodox Judaism nowadays, zavah and niddah are no longer distinguished. A menstruating woman is required to wait the seven additional clean days that she would if she were a zavah. Conversely, Reform Judaism regards such regulations as anachronistic; adherents of Conservative Judaism take a view somewhere between these views, with opinions in favor of returning to the Biblical distinction between niddah and zavah.