Timing of initiation | Need for additional precautions after starting | Additional information |
Day 1-2 of HFI (hormone free interval) | No | Day 1 is the optimal time to switch |
Day 3-7 of HFI OR week 1 following HFI | Yes (48 hours). If UPSI has occurred after Day 3 of HFI advise continuing the CHC method for at least 7 days | If CHC cannot be continued, switch to POP immediately and consider the need for EC and PT |
Week 2-3 of CHC use | No, providing the method has been used consistently and correctly (i.e. at least 7 consecutive pills taken or 7 days of patch or ring use prior to switching) | There is evidence to suggest that taking hormonally active pills for 7 consecutive days prevents ovulation in the subsequent 7 days (2) |
Reference:
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.