How often does the NuvaRing need to be inserted for effective birth control?

The NuvaRing is designed to be inserted into the vagina for a period of three weeks, during which it continuously releases hormones to prevent ovulation and provide effective birth control. After these three weeks, the ring is removed for a one-week period, during which a withdrawal bleed typically occurs, similar to a menstrual period. Following this week without the ring, a new NuvaRing is inserted, which starts the cycle over again. Therefore, it must be inserted once a month to maintain effective contraceptive protection, making the option that states it needs to be inserted once a month the correct choice.