Body Composition and Sport Performance Among Young Female Soccer Players Using Subdermic Etonogestrel

Studies indicate a worsening of performance in young people with excessive menstrual bleeding and menstrual cramps. Hormonal contraception has been used to "manipulate" menstrual symptoms among physically active women, amateur and elite athletes. The use of the etonogestrel subdermal implant (Implanon NXT) would be a good option for young female soccer players. The goal of this study is to evaluate some parameters among young female soccer players under 17 years old during one year, in use of subdermic etonogestrel implant comparing with a non-users subdermic etonogestrel implant