Tocolysis in the Management of Preterm Premature Rupture of Membranes Before 34 Weeks of Gestation

Loading dose: Oral Nifedipine 20 mg prolonged-release at T0 and T0.5 (i.e. 30 min), total=2x20 mg Maintenance dose: Oral Nifedipine 20 mg prolonged-release at T3, then 1 pill every 8 hr for 48 hr (i.e. T11, T19, T27, T35 and T43, total=6x20 mg)

Oral Placebo of Nifedipine 20 mg, at T0, T0.5, T3, T11, T19, T27, T35 and T43