contraception
Conditions
Interventions
Sponsors
National Research Institute for Family Planning
Eligibility
Sex/Gender
Female
Age
20 Years to 45 Years
Inclusion criteria
Inclusion criteria: To be eligible for enrolment, women had to be healthy;?20 years and?45 years old; having had given birth before; having normal monthly bleeding (menstruation cycle was 21 to 42 days and regular, and menstrual period was less than 7 days); no irregular bleeding and no hydatidiform mole; uterine cavity was 5.5 to 9.0 cm (not include cesarean); having hemoglobin above 90 kilos per liter; relying solely on the IUD for fertility regulation; informed and agreed to take part in the study.
Exclusion criteria
Exclusion criteria: Contraindications included pregnancy, uterine abnormalities, evidence of vaginal or pelvic infections, uterine cavity length >9 cm, cervical neoplasia, anemia and daily lactation.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| pregnancy;expulsions;all medical removals;use-related discontinuation; | — |
Contacts
Public ContactWu Shangchun
Outcome results
None listed