Progesterone implants are put under the skin in the arm and are effective for 3 years. Side effects can be more confusing with progesterone methods, so careful review with a healthcare provider is needed before using this method. IUD's, or intra-uterine devices, are a safe alternative for some women. The IUD is placed in the uterus by a healthcare provider and can be relied on for a period of years. One risk of IUD use is the possibility of infection, especially for women who have multiple sex partners.
Serious infections can cause infertility, which is the inability to have babies.
That is why IUDs are safe only in women with low risk sex, such as married women with only one partner. Barrier methods include diaphragms, cervical caps, and latex or plastic condoms for men or women. These have the least side effects, but are also the least reliable. The diaphragm and cap need to be fitted to you by a healthcare provider who will help you understand how to place and use them. Sexually transmitted diseases are less common in users of these forms, especially the condom.