On occasion, irritation or an allergic reaction may occur, but these can usually be alleviated by discontinuing that particular method or by changing brand names. Semen is collected inside the condom, which must be kept in place throughout intercourse and then carefully removed after ejaculation. Condoms are readily available at low cost in most drug and grocery stores. Some family planning clinics offer free condoms. About 15 pregnancies occur over one year out of 100 couples using this method.
Effectiveness increases when a spermicide is also used.
All forms can be purchased in most drug and grocery stores. Used by itself, this method is not very effective. About 21 pregnancies occur over one year out of 100 women using spermicides alone. The use of a spermicide along with a condom is extremely effective against pregnancy and is more effective against STD transmission than either method used separately. Vaginal contraceptive sponge-Soft synthetic sponges saturated with a spermicide.