At first, the requirement for a medical prescription may seem counterproductive, but if after the first 3 months the contraceptive method chosen is found to be the most suitable, the gynecologist can write you a prescription that covers a longer period of time (6 months or more). The availability of a renewable, long-term prescription and lasting supplies reduces the possibility of suspension for lack of preparation or for inability to renew the prescription, for example for a woman who moves frequently, travels or does professional sports.