Effect of Progesterone on Latent Phase Prolongation in Patients With Preterm Premature Rupture of Membranes


Preterm premature rupture of membranes (PPROM) is a condition leading to an increased risk of maternal and neonatal morbidity and mortality in pregnant women. To prevent this complication, some studies have proposed using prophylactic progesterone. However, due to lack of sufficient relevant data, there is still need for further studies in this regard. This study was performed to determine the effect of rectal progesterone on the latent phase and maternal and neonatal outcome variables in females with PPROM. During the present randomized clinical trial study (IRCT201512077676N4), a total of 120 patients with PPROM at pregnancy ages between 26 and 32 weeks were randomly assigned to 2 equal intervention and control groups. In the intervention group, progesterone suppositories (400 mg per night) were administered until delivery or completion of the 34th gestational week and was compared with placebo effect in control group. The latent phase and maternal and neonatal outcome variables were compared between the two groups. The mean age of patients was 29.56±5.66 (19-42) and 29.88±5.57 (17-40) years in the intervention and control group, respectively. The two groups were almost identical in the confounding factors. The median latent phase was 8.5 days in the intervention group vs. 5 days in the control group in the 28th-30th weeks of gestation, which was significantly higher in the intervention group (P=0.001). Among maternal and neonatal outcome variables, only the mean birth-weight was significantly higher in the intervention group than that in the controls (1609.92±417.28 gr vs. 1452.03±342.35 gr, P=0.03). Administration of progesterone suppository in patients with PPROM at gestational ages of 28 to 30 weeks is effective in elongating the latent phase and increasing birth-weight with no significant complications.

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IssueVol 55, No 12 (2017) QRcode
Preterm premature rupture of membranes PPROM Progesterone Latent phase

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Abdali F, Taghavi S, Vazifekhah S, Naghavi Behzad M, Mirza Aghazadeh Attari M. Effect of Progesterone on Latent Phase Prolongation in Patients With Preterm Premature Rupture of Membranes. Acta Med Iran. 2018;55(12):772-778.