Menstrual cupA menstrual cup is a menstrual hygiene device which is inserted into the vagina during menstruation. Its purpose is to collect menstrual fluid (blood from the uterine lining mixed with other fluids). Menstrual cups are usually made of flexible medical grade silicone, latex, or a thermoplastic isomer. They are shaped like a bell with a stem or a ring. The stem is used for insertion and removal, and the bell-shaped cup seals against the vaginal wall just below the cervix and collects menstrual fluid.
NiddahNiddah (or nidah; נִדָּה), in traditional Judaism, describes a woman who has experienced a uterine discharge of blood (most commonly during menstruation), or a woman who has menstruated and not yet completed the associated requirement of immersion in a mikveh (ritual bath). In the Book of Leviticus, the Torah prohibits sexual intercourse with a niddah. The prohibition has been maintained in traditional Jewish law and by the Samaritans. It has largely been rejected by adherents of Reform Judaism and other liberal branches.
MenstruationMenstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone levels and is a sign that pregnancy has not occurred. The first period, a point in time known as menarche, usually begins between the ages of 12 and 15. Menstruation starting as young as 8 years would still be considered normal.
MikvehMikveh or mikvah (, () mikva'ot, mikvoth, mikvot, or (Yiddish) mikves, lit., "a collection") is a bath used for the purpose of ritual immersion in Judaism to achieve ritual purity. Most forms of ritual impurity can be purified through immersion in any natural collection of water. However, some impurities, such as a zav, require "living water", such as springs or groundwater wells. Living water has the further advantage of being able to purify even while flowing, as opposed to rainwater which must be stationary to purify.