Contraception or birth control are methods intended to be used to to prevent pregnancy. Contraceptives work in different ways:

1. Preventing sperm from getting to the eggs such as  condoms, diaphragms, cervical caps, and contraceptive sponges.
2. Preventing the release of an egg such as birth control pills, patches, shots, vaginal rings, and emergency contraceptive pills.
3. Implants inside the uterus such as intra-uterine devices. (IUD) 
4. Male of female sterilization to permanently prevent the man for ejaculating sperms of tubal sterilization to prevent the sperm from joining the egg

How Does a Vasectomy Reversal Work?

What is a vasectomy reversal and how does it work? ... read more »

Pregnancy After Different Forms of Contraception

The percentage of women experiencing an unintended pregnancy during the first year of typical use and the first year of perfect use of contraception and the percentage continuing use at the end of the first year in the United States. ... read more »

Comparing Birth Control: The Pearl Index Method

The Pearl Index compares methods of contraception. A high Pearl index stands for a high chance of unintentionally getting pregnant while a low value represents a low chance. ... read more »