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:
- 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.
- 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.
- 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.
調査の概要
研究の種類
入学 (実際)
段階
- 適用できない
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- able to give informed consent
- postpartum women delivering at the University of New Mexico Hospital
- Intend to breastfeed
- Plan to use oral contraceptives as her family planning method
- Willing to be randomized to either progestin-only pills or combined pills
Exclusion Criteria:
- medical contraindications to combined pills including history of thromboembolism, uncontrolled hypertension or complex migraine headaches
- preterm birth (<37 weeks)
- small for gestational age infant (<2500 grams)
- large for gestational age infant (>4500 grams)
- infant with major congenital anomaly
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:4倍
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
|
アクティブコンパレータ:Study Arm A
Study Arm A is one of two interventions (Combined estrogen-progestin pill)
|
1 mg norethindrone and .035
mg ethinyl estradiol orally for 21 days followed by 7 days of placebo
他の名前:
|
|
アクティブコンパレータ:Study Arm B
Study Arm B is one of two interventions (Progestin-only pill)
|
.35 mg norethindrone once a day orally
他の名前:
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Number of Participants Who Continued to Breastfeed at 6 Months
時間枠: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
|
Baseline to Week 8, Week 8, 2-6 months
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Number of Participants Who Continued Birth Control Method After 6 Months
時間枠:Baseline to Week 8, Week 8, 2-6 months
|
Proportion of participants who are continuing to use either combined estrogen-progestin pill or progestin-only pill up to 6 months after delivery
|
Baseline to Week 8, Week 8, 2-6 months
|
|
Infant Length Growth From 2-8 Weeks
時間枠:Week 2 and Week 8
|
Comparison of infant length at 2 weeks and 8 weeks between postpartum breastfeeding women using progestin-only pills vs. combined pills.
Inclusion criteria of mother's who are actively breastfeeding.
|
Week 2 and Week 8
|
|
Infant Weight Growth From 2-8 Weeks
時間枠:Week 2 and Week 8
|
Comparison of infant growth at 2 weeks and 8 weeks between postpartum breastfeeding women using progestin-only pills vs. combined pills.
Inclusion criteria of mother's who are actively breastfeeding.
|
Week 2 and Week 8
|
|
Infant Occipitofrontal Circumference Growth From 2-8 Weeks
時間枠:Week 2 and Week 8
|
Comparison of infant growth at 2 weeks and 8 weeks between postpartum breastfeeding women using progestin-only pills vs. combined pills.
Inclusion criteria of mother's who are actively breastfeeding.
|
Week 2 and Week 8
|
協力者と研究者
スポンサー
捜査官
- 主任研究者:Eve Espey, MD、UNM OB Gyn
出版物と役立つリンク
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。