Birth control methods that act on the endocrine system
Hormonal Contraception
Background
Type
Hormonal
First use
1960
Pregnancy rates (first year)
Perfect use
Varies by method: 0.05-2%
Typical use
Varies by method: 0.05-9%
Usage
Duration effect
Various
Reversibility
Upon discontinuation
User reminders
Must follow usage schedule
Clinic review
Every 3–12 months, depending on method
Advantages and disadvantages
STI protection
No
Periods
Withdrawal bleeds are frequently lighter than menstrual periods, and some methods can suppress bleeding altogether
Weight
No proven effect
oral birth control
Hormonal contraception refers to birth control methods that act on the endocrine system. Almost all methods are composed of steroid hormones, although in India one selective estrogen receptor modulator is marketed as a contraceptive. The original hormonal method—the combined oral contraceptive pill—was first marketed as a contraceptive in 1960.[1] In the ensuing decades, many other delivery methods have been developed, although the oral and injectable methods are by far the most popular. Hormonal contraception is highly effective: when taken on the prescribed schedule, users of steroid hormone methods experience pregnancy rates of less than 1% per year. Perfect-use pregnancy rates for most hormonal contraceptives are usually around the 0.3% rate or less.[2] Currently available methods can only be used by women; the development of a male hormonal contraceptive is an active research area.
There are two main types of hormonal contraceptive formulations: combined methods which contain both an estrogen and a progestin, and progestogen-only methods which contain only progesterone or one of its synthetic analogues (progestins). Combined methods work by suppressing ovulation and thickening cervical mucus; while progestogen-only methods reduce the frequency of ovulation, most of them rely more heavily on changes in cervical mucus. The incidence of certain side effects is different for the different formulations: for example, breakthrough bleeding is much more common with progestogen-only methods. Certain serious complications occasionally caused by estrogen-containing contraceptives are not believed to be caused by progestogen-only formulations: deep vein thrombosis is one example of this.
^Susan Scott Ricci; Terri Kyle (2009). "Common Reproductive Issues". Contraception. Lippincott Williams & Wilkins. p. 119.
^National Prescribing Service (11 December 2009). "NPS News 54: Hormonal contraceptives – tailoring for the individual". Retrieved 19 March 2009.
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Hormonalcontraception refers to birth control methods that act on the endocrine system. Almost all methods are composed of steroid hormones, although...
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