When to insert the vaginal ring depends on whether you’re already using hormonal birth control or not.
If you aren’t currently on hormonal birth control, you’ll insert the ring on the first day of your period. You’ll be protected straight away. If you wait to insert the ring until the second through fifth day of your period, though, you should use condoms for the following week, as your protection won’t start immediately. Whenever you’re using additional protection, don’t use a second hormonal method — just use condoms.
If you’ve been taking the combined pill, insert the ring the day after taking any pill in the pack.
If you’re switching from the patch, insert the ring on the day you remove the patch. You don’t want to have a gap in your coverage.
If you’ve been getting the depo shot, you can insert the ring up to 15 weeks after your last injection.
Let the doctor know if you’re switching from another birth control method during your consultation.