Encare offers a vaginal contraceptive that is easy to use, convenient to carry, and effective. I have used them many times throughout my adult life. They contain nonoxynol-9, a vaginal contraceptive. They work by inserting the small capsule at least 10 minutes prior to intercourse, and last up to one hour after. They protect against unwanted pregnancy, but do not protect against any STD's or the HIV virus. They work by killing sperm on contact and providing a barrier to a woman's cervix. They are wonderful-I get no hormonal side effects, the are comfortable and easy to use, and they are relatively inexpensive for birth control. They can be found at most drugstores and super-centers for minimal cost. I have used them for years and never had a pregnancy happen through them.