It has been used safely in Europe for more than 15 years. Because you do not ovulate, you also no longer have menstrual cycles. Women using this method experience irregular spotting. However, after one year of use half of women no longer have any menstrual blood at all. You only have to do something once in 12 weeks to prevent pregnancy.
Many women also consider the loss of menses to be an advantage.
Inability to predict when you will bleed. If planning a pregnancy in the next two years, note that infertility may continue for six to 18 months after last injection. Weight gain may be noted over time. Other side effects, such as depression, are less common but can occur. They can be made of latex or natural lambskin.