Final answer:
The statement is false; the NuvaRing does not need to be placed over the cervix but instead is inserted into the vagina where it releases hormones to prevent pregnancy.
Step-by-step explanation:
The statement "The NuvaRing must be placed over the cervix to be effective." is false. Unlike diaphragms, which must be placed directly over the cervix, the NuvaRing is a type of vaginal ring contraceptive that is inserted into the vagina. Once inside, it releases hormones such as progestin and estrogen to prevent pregnancy by stopping ovulation and thickening the cervical mucus, which makes it harder for sperm to reach an egg. The exact position of the NuvaRing in the vagina is not critical to its effectiveness as long as it is properly inserted.