48-hours administration of nifedipine in spontaneous preterm labor - Doppler blood flow assessment of placental and fetal circulation.
OBJECTIVES: The aims were to assess the placental and fetal circulation during nifedipine tocolysis within the first 48 hours of therapy.
METHODS: Placental and fetal circulation was assessed in Doppler ultrasound examination prior to nifedipine administration and then after 24 and 48 hours. Maternal heart rate a.....