The value of oral micronized progesterone in the prevention of recurrent spontaneous preterm birth: a randomized controlled trial.

Abstract:

INTRODUCTION:Progesterone is becoming universally accepted for preventing recurrent spontaneous preterm delivery. There is, however, poor consensus on the effective types and doses of progesterone to be used. Despite the encouraging available research, the role of oral micronized progesterone has not yet been thoroughly investigated. MATERIAL AND METHODS:We randomized 212 singleton pregnancies with past history of spontaneous preterm delivery at <37 weeks, into a progesterone group (receiving 100 mg oral micronized progesterone, six-hourly, starting at 14-18 weeks until 37 weeks or delivery) and an identical placebo group. The rate of spontaneous preterm delivery was the primary outcome. Secondary outcomes included gestational age at birth and admission to neonatal intensive care units. RESULTS:The progesterone group delivered at a later gestational age, and needed longer tocolysis-to-delivery intervals (35.4 weeks vs. 33.9 weeks, p = 0.01, and 87 days vs. 36 days, p < 0.001, respectively). The relative risk of spontaneous preterm delivery was 0.7 (95% confidence interval 0.54-0.92, p = 0.01), and the number needed-to-treat to prevent one case of spontaneous preterm delivery was 5 (95% confidence interval 3-20). The two groups had similar rates of operative delivery and postpartum complications. Progesterone was associated with mild maternal dizziness (29.1% vs. 9.8%, p = 0.002), somnolence (41.6% vs. 19.7%, p = 0.002), and vaginal dryness (20.8% vs. 8.7%, p = 0.03), lower neonatal mortality rates (7.3% vs. 25.2%, p < 0.001), and shorter neonatal intensive care unit admissions (p = 0.008). CONCLUSION:Oral micronized progesterone is effective in preventing spontaneous preterm delivery. The additional advantages of oral administration, affordability, and high safety profile make it worth recommending, at least for further research.

authors

Ashoush S,El-Kady O,Al-Hawwary G,Othman A

doi

10.1111/aogs.13236

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

1460-1466

issue

12

eissn

0001-6349

issn

1600-0412

journal_volume

96

pub_type

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