Final answer:
The NuvaRing is a once-a-month birth control option that is inserted intravaginally and should be refrigerated prior to use.
Step-by-step explanation:
NuvaRing is a hormonal contraceptive device designed for women to prevent pregnancy. It is a small, flexible plastic ring that is inserted into the vagina, releasing a combination of hormones to provide contraception.
The birth control option that is used once a month, inserted intravaginally, and must be refrigerated prior to use is known as the NuvaRing.