What is the association between progestin-only contraceptive use and changes in body weight?
It was not possible to conduct a meta-analysis due to the range of contraceptive methods examined and differences in reporting of weight change. More weight gain was noted at 2 and 3 years, but was generally similar for both comparison groups. People may gain weight over time regardless of contraceptive use.
Progestin-only contraceptives are appropriate for many women who cannot or should not take oestrogen. Many progestin-only contraceptives are long-acting, cost-effective methods of preventing pregnancy. However, concern about weight gain can deter the initiation of contraceptives and cause early discontinuation among users.