Contraception Pregnancy and Childbirth Contraception
Conditions
Interventions
1. Levonorgestrel two doses of 0.75 mg 12 hours apart
2. Levonorgestrel two doses of 0.75 mg 24 hours apart
Sponsors
World Health Organisation (WHO) (Switzerland)
Eligibility
Sex/Gender
Female
Inclusion criteria
Inclusion criteria: 1. Requesting emergency contraception within 120 hours of unprotected intercourse 2. Only one act of unprotected intercourse during current cycle 3. Willing to abstain from further acts during current cycle 4. Regular menstrual cycles (24 to 42 days) 5. Having at least one spontaneous cycle before current cycle 6. Available for follow-up in the next six weeks 7. Negative pregnancy test 8. Willing to participate 9. Not breastfeeding 10. No use of hormonal contraceptives or of rhythm or natural family planning method of contraception during current cycle 11. Not unsure about the date of last menstrual period
Exclusion criteria
Exclusion criteria: 1. Post-abortion or post-partum patients whose period had not yet returned 2. Regular use of prescription drugs before admission to the study 3. Intercourse during the treatment cycle greater than 120 hours before admission into the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Pregnancy rate | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Delay in onset of next menses 2. Incidence of side-effects | — |
Countries
China
Outcome results
None listed