Switch from | Switch to | When to start | Requirement for additional contraceptive precaution | Notes |
Cu-IUD | CHC | Up to Day 5 of menstrual cycle (Day 1 estradiol COC) | No | Cu-IUD can be removed at that time. |
At any other time during the menstrual cycle or if amenorrhoeic | Yes (7 days)* | AND retain Cu-IUD for 7 days after last UPSI. | ||
Non-hormonal method (other than a Cu-IUD) | CHC | Up to and including Day 5 of menstrual cycle (Day 1 estradiol COC) | No | |
At any other time | Yes (7 days*) | Consider follow-up pregnancy test. If amenorrhoeic, a negative HSUPT should be obtained before starting CHC. |
CHC, combined hormonal contraception; COC, combined oral contraception; Cu-IUD, copper intrauterine device; HSUPT, high-sensitivity urine pregnancy test.
*9 days estradiol valerate/dienogest pill.