<unk> , also known as<unk> -only<unk> <unk> , is a form of<unk> <unk>  used for birth control when breastfeeding. Use can begin at four weeks and continue for at least up to a year following childbirth. Failure rates with usual use is about 1.5 per 100 women. It is used within the<unk> with one<unk>  lasting three months. The woman is able to place and remove the<unk>  herself. It is sold under the brand names Progering among others. Side effects include<unk>  discharge and pain with urination. It does not appear to be associated with serious side effects. With use menstrual periods often do not resume. It was specifically made for use with breastfeeding as it does not affect milk production. It works by gradually releasing the hormone<unk> .<unk> s have been approved for medical use since 1998. It is on the World Health Organization's List of Essential Medicines. As of 2014, they are available in a number of South and Central American countries. As of 2016, it is not available in the United States. It was developed by the Population Council.
Progesterone vaginal ring
High-dose estrogen
Levonorgestrel-releasing implant
Hormonal IUDs
Sacrohysteropexy
Contraceptive implant
Male contraceptive
Hysterotomy