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Intermenstrual bleeding (IMB), or metrorrhagia, is vaginal bleeding at irregular intervals between expected menstrual periods. [1] It may be associated with bleeding with sexual intercourse . [ 2 ] The term metrorrhagia, in which metro means measure and -rrhagia means abnormal flow, [ 3 ] is no longer recommended.
In modern Western society, women typically have about 450 periods during their lives, as compared to about 160 formerly. [7] Although it was evident that the pill could be used to suppress menstruation for arbitrary lengths of time, the original regimen was designed to produce withdrawal bleeding every four weeks to mimic the menstrual cycle. [8]
These methods have traditionally been used in a cyclic fashion, with three weeks (21 days) of hormones, followed by a 7-day hormone-free interval (with combined oral contraceptives, often with a week of placebo pills) during which time withdrawal bleeding or a hormonally-induced menstrual period occurs, mimicking an idealized spontaneous ...
With the placebo pills in birth control, Wider explains, bleeding results due to the drop in hormones. "The lining is soft enough to cause a bit of bleeding," she says. "The blood doesn't contain ...
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Combined hormonal contraception (CHC), or combined birth control, is a form of hormonal contraception which combines both an estrogen and a progestogen in varying formulations. [ 1 ] [ 2 ] The different types available include the pill , the patch and the vaginal ring , which are all widely available, [ 3 ] and an injection , which is available ...
Long-acting reversible contraceptives (LARC) are methods of birth control that provide effective contraception for an extended period without requiring user action. They include hormonal and non-hormonal intrauterine devices (IUDs) and subdermal hormonal contraceptive implants. They are the most effective reversible methods of contraception ...
Women who are known to be pregnant should not take combined oral contraceptive pills. Those in the postpartum period who are breastfeeding are also advised not to start combined oral contraceptive pills until 4 weeks after birth due to increased risk of blood clots. [40]