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  2. Emergency contraception - Wikipedia

    en.wikipedia.org/wiki/Emergency_contraception

    Rather, they mean that if 1,000 women have unprotected intercourse in the middle two weeks of their menstrual cycles, approximately 80 will become pregnant. Use of emergency contraceptive pills would reduce this number by 75 percent, to 20 women.

  3. Extended cycle combined hormonal contraceptive - Wikipedia

    en.wikipedia.org/wiki/Extended_cycle_combined...

    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]

  4. Combined oral contraceptive pill - Wikipedia

    en.wikipedia.org/wiki/Combined_oral...

    The US Food and Drug Administration (FDA) initiated studies evaluating the health of more than 800,000 women taking combined oral contraceptive pills and found that the risk of VTE was 93% higher for women who had been taking drospirenone combined oral contraceptive pills for 3 months or less and 290% higher for women taking drospirenone ...

  5. Levonorgestrel - Wikipedia

    en.wikipedia.org/wiki/Levonorgestrel

    Levonorgestrel is a hormonal medication which is used in a number of birth control methods. [3] [7] It is combined with an estrogen to make combination birth control pills. [8]As an emergency birth control, sold under the brand names Plan B One-Step and Julie, among others, it is useful within 72 hours of unprotected sex.

  6. Oral contraceptive pill - Wikipedia

    en.wikipedia.org/wiki/Oral_contraceptive_pill

    The progestogen-only pill, colloquially known as "minipill". For perfect use it is 99% effective and typical use is 91% effective. Side effects of the pill include headache, dizziness, nausea, sore breasts, spotting, mood changes, acne, bloating, etc. [clarification needed] One pill offers the benefit of only having to be taken once a week:

  7. Birth control in the United States - Wikipedia

    en.wikipedia.org/wiki/Birth_control_in_the...

    [82] 10.6% of women at risk of unintended pregnancy did not use a contraceptive method, including 18.7% of teens and 14.3% of those 20–24. [80] Women of reproductive age (15 to 44) who are not regarded as at risk for unintended pregnancy include those who are sterile, were sterilized for non-contraceptive reasons, were pregnant or trying to ...