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Chapters

0:00 Introduction
0:35 how to use a menstrual cup
2:16 Pros and Cons





A 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. This is unlike tampons and menstrual pads, which absorb the fluid instead.[1][2]

Every 4–12 hours (depending on the amount of flow), the cup is removed, emptied, rinsed, and reinserted. After each period, the cup requires cleaning.[3] One cup may be reusable for up to 10 years,[4] making their long-term cost lower than that of disposable tampons or pads, though the initial cost is higher. As menstrual cups are reusable, they generate less solid waste than tampons and pads, both from the products themselves and from their packaging.[4] Most menstrual cup brands sell a smaller and a larger size. Some menstrual cups are sold colorless and translucent, but several brands also offer colored cups.[5]

Menstrual cups typically do not leak if used properly, though incorrect placement or inadequate cup size can cause some women to experience leakage.[4] Menstrual cups are a safe alternative to other menstrual products; risk of toxic shock syndrome infection is similar or less with menstrual cups compared to pads or tampons.[4] The menstrual cup is first folded or pinched and then inserted into the vagina. It will normally unfold automatically and create a light seal against the cervix. In some cases, the user may need to twist the cup or flex the vaginal muscles to ensure the cup is fully open. If correctly inserted, the cup should not leak or cause any discomfort.[6] The stem should be completely inside the vagina. If it is not, the stem can be trimmed. There are various folding techniques for insertion; common folds include the c-fold, as well as the punch-down fold.[7]

If lubrication is necessary for insertion, it should be water-based, as silicone lubricant can be damaging to the silicone.

After 4–12 hours of use (depending on the amount of flow), the cup is removed by reaching up to its stem to find the base. Simply pulling on the stem is not recommended to remove the cup, as this can create suction. The base of the cup is pinched to release the seal, and the cup is removed.[6] After emptying, a menstrual cup should be rinsed or wiped and reinserted. It can be washed with a mild soap, and sterilized in boiling water for a few minutes at the end of the cycle. Alternatively, sterilizing solutions (usually developed for baby bottles and breast pump equipment) may be used to soak the cup. Specific cleaning instructions vary by brand.
Advantages

When using a menstrual cup, the menstrual fluid is collected after it flows from the cervix and is held in liquid form. With tampons, liquid is absorbed and held in semi-coagulated form against the cervix.[8]
If a user needs to track the amount of menses produced (e.g., for medical reasons), a menstrual cup allows one to do so accurately.
Users employ about 1-2 liters of water to clear menstrual cups.[9]

Acceptability studies
A large Fleurcup menstrual cup (center) can hold about 3 times as much liquid as a large tampon

A 2011 randomized controlled trial in Canada investigated whether silicone menstrual cups are a viable alternative to tampons and found that approximately 91% of women in the menstrual cup group said they would continue to use the cup and recommend it to others.[10] In a 1991 clinical study involving 51 women, 23 of the participants (45%) found rubber menstrual cups to be an acceptable way of managing menstrual flow.[11]

In a pilot project among refugees in Uganda, 87% used the menstrual cup consistently over 3-months.[9]

In a randomized controlled feasibility study in rural western Kenya, adolescent primary school girls were provided with menstrual cups or menstrual pads instead of traditional menstrual care items of cloth or tissue.[12] Girls provided with menstrual cups had a lower prevalence of sexually transmitted infections than control groups. Also, the prevalence of bacterial vaginosis was lower among cup users compared with menstrual pad users or those continuing other usual practice.[12] After six months, menstrual cup users were free from embarrassing leakage or odor, and could engage in class activities and sport without humiliation or being teased.[13]
Access to water and hygiene
Boiling a menstrual cup