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  2. Comparison of birth control methods - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_birth...

    There are two different types of emergency contraceptive pills, one contains levonorgestrel and can prevent pregnancy if taken within 3 days of intercourse. The other contains ulipristal acetate and can prevent pregnancy if taken within 5 days of intercourse. This option can be used if other birth control methods fail. [5]

  3. Birth control - Wikipedia

    en.wikipedia.org/wiki/Birth_control

    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]

  4. Hormonal contraception - Wikipedia

    en.wikipedia.org/wiki/Hormonal_contraception

    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 ...

  5. Calendar-based contraceptive methods - Wikipedia

    en.wikipedia.org/wiki/Calendar-based...

    Various methods are known as the Knaus–Ogino method and the rhythm method. The standard days method is also considered a calendar-based method, because when using it, a woman tracks the days of her menstrual cycle without observing her physical fertility signs. The standard days method is based on a fixed formula taking into consideration the ...

  6. What is emergency contraception and how does it work ... - AOL

    www.aol.com/lifestyle/emergency-contraception...

    Emergency contraception helps prevent pregnancy up to five days after having unprotected sex. Here's what you need to know about it.

  7. Reproductive technology - Wikipedia

    en.wikipedia.org/wiki/Reproductive_technology

    Methods are intended to "prevent the fertilization of an egg or implantation of a fertilized egg in the uterus." [ 10 ] Different forms of birth control have been around since ancient times, but widely available effective and safe methods only became available during the mid-1900s.

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