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The SERM ormeloxifene is less effective than the steroid hormone methods; studies have found a perfect-use failure rate near 2% per year. [11] [12] Long-acting methods such as the implant and the IUS are user-independent methods. [13] For user-independent methods, the typical or actual-use failure rates are the same as the method failure rates ...
However, continuation rates are much higher with IUDs compared to non-long-acting methods. [12] A positive characteristic of IUDs is that fertility and the ability to become pregnant returns quickly once the IUD is removed. [13] Because of their systemic nature, hormonal methods have the largest number of possible side effects. [14]
Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent pregnancy. [1] [2] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [3]
The estrogen is generally a short-acting estradiol ester, which acts as a prodrug of estradiol. [24] Esters of estradiol are natural and bioidentical estrogens, and are believed to have more favorable effects on lipid metabolism, cardiovascular health, and hemostasis than synthetic estrogens such as ethinylestradiol.
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 ...
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Estradiol cypionate/medroxyprogesterone acetate (EC/MPA), sold under the brand name Cyclofem among others, is a form of combined injectable birth control. [2] It contains estradiol cypionate (EC), an estrogen, and medroxyprogesterone acetate (MPA), a progestin. [2]
All contain an estrogen, ethinylestradiol or mestranol, [1] [2] in varying amounts, and one of a number of different progestogens. (Regarding the estrogen, the inactive 3-methyl ether of ethinylestradiol, which must be metabolized by the liver into the active ethinylestradiol; 50 μg of mestranol is equivalent to only 35 μg of ethinylestradiol and should not be used when high-dose [50 μg ...