None listed
Conditions
Brief summary
to use sildenafil to prevent preterm labour with high effeicacy & most safe , as it is an excellent muscle relaxant.
Interventions
Sponsors
Study design
Eligibility
Inclusion criteria
-pregnant woman 18-24 weeks gestation , the gestational age was estimated by the date of the last menstrual period and confirmed by fetal growth measurement with ultrasound. -Asymptomatic pregnant woman with a history of at least 1 previous preterm labour( between 20 and 36 weeks plus 6 days gestational age).
Exclusion criteria
-multiple pregnancy -premature rupture of membrane -vaginal bleeding -diabetes -history of cardiovascular disease -herniation of the membrane beyond the external cervical os -congenital anomalies of the fetus -any fetal or maternal contraindication to tocolysis(fetal asphyxia, intrauterine growth restriction, pre-ecalmpsia , clinical diagnosis of abruption placentae, placenta previa) -active liver disease, renal impairment. - recent stroke or heart attack.