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Breastfeeding and Oral Contraceptives: a Randomized, Controlled Trial
Objectives To clarify the relationship between postpartum (2 weeks) use of progestin-only vs. combined oral contraceptive pills and the outcomes of breastfeeding continuation, infant growth, contraceptive method continuation, and pregnancy rates in breastfeeding women. Specific research questions: 1. To determine whether there is a difference in rates of breastfeeding continuation at 2 months and 4 months between postpartum breastfeeding women using progestin-only pills vs. combined pills. 2. To determine whether there is a difference in infant growth at 2 weeks and 8 weeks between postpartum breastfeeding women using progestin-only pills vs. combined pills. 3. To determine whether there is a difference in birth control method continuation at 2 months and 4 months between postpartum breastfeeding women using progestin-only pills vs. combined pills. Hypothesis Combined oral contraceptive pills, when initiated by postpartum breastfeeding women, will cause a differential in continuation of breastfeeding: 35% continuation in the combined pill group vs. 60% in the progestin-only pill group at 8 weeks.
Details
| Lead sponsor | University of New Mexico |
|---|---|
| Phase | NA |
| Status | COMPLETED |
| Enrolment | 197 |
| Start date | 2005-01 |
| Completion | 2008-06 |
Conditions
- Breast Feeding
- Contraception
Interventions
- Combined estrogen-progestin pill
- Progestin-only pill
Primary outcomes
- Number of Participants Who Continued to Breastfeed at 6 Months — Baseline to Week 8, Week 8, 2-6 months
Proportion of participants who are continuing to breastfeed from 2 months to 6 months after delivery