Birth Control

How do Birth Control Pills Work?

Birth control pills are taken orally once a day for pregnancy prevention. This type of contraception works by continually releasing small amounts of hormones into the body, which prevents ovulation. Most birth control pills are a combination of estrogen and progestin, but the "mini pill" has progestin only. Birth control pills can be highly effective -- over 99% effective with perfect use. However, human error often reduces the effectiveness rate. Forgetting a dose or taking pills on an erratic schedule will greatly lower the effectiveness.

How Does the Birth Control Shot Work?

The birth control shot (Depo-Provera) is injected every 3 months for pregnancy prevention. When Depo-Provera is injected at the ideal times, it will prevent pregnancy 94% of the time.

How Does the Birth Control Patch Work?

The birth control patch uses estrogen and progestin to prevent pregnancy. A small adhesive bandage is re-applied weekly. If the birth control patch is used precisely as directed, it's about 99% effective. However, human error like improper application or application at the wrong times lowers the effectiveness considerably.