When it comes to intrauterine devices, there are greater concerns about their side effects. In fact, due to its safety, effectiveness, economy and reversibility advantages, about half of the women in the country use iuds as a method of contraception。Synopsis: the annual world contraceptive day is coming, and on the occasion of the 26th of september, the sex-love internet invites young gynecologist rae zhiwen, a contraceptive method that is