This clear, bendablecontraceptivering is meant to stay in the vagina for three weeks each month.
But levels of those hormones deplete, which is why timely removal and replacement is so important.
This article explains what to do if you forget to replace your NuvaRing according to the recommended schedule.

Verywell / Theresa Chiechi
Recommended NuvaRing Removal Schedule
Each NuvaRing is prescribed on a 28-day cycle.
Generally speaking, the NuvaRing is 91% to 99.7% effective.
Your NuvaRing is still effective if you forget to take it out during week 4.
One study suggested that the NuvaRing may provide ample protection for up to 35 days.
Your NuvaRing may slightly move around within your vagina.
However, if it feels uncomfortable or hurts, you may not have inserted it far enough.
Use your finger to carefully push your NuvaRing as far as you’ve got the option to.
Don’t worry about pushing too far; it won’t get lost.
Seek emergency care if you have:
Planned Parenthood.What should I do if I mess up using NuvaRing?
Merck Sharp & Dohme B.V., a subsidiary of Merck & Co., Inc. 2018.
2010; 15(1):17-22.