An important distinction to be aware of is that if you use NuvaRing, you must discard the ring and insert a new one after seven days. If you use Annovera, you'll use the same ring for an entire year.

Here's how the vaginal birth control ring works, how to use it, and it's benefits and ... The monthly ring (brand name NuvaRing): You insert the ring into your vagina and keep it in for three ...