long term management of preterm labor with mgso4 in myomatous uterus

background: according to the text book of obstetrics and gynecology, prematurity is the first cause of perinatal mortality. therefore postponing delivery will become mandatory to prevent complications of prematurity. parental mgso4 is one of the most common and the safest medications for this purpose. case report: we present a primigravida patient with multiple uterine myoma who had premature labor and received intravenous mgso4 for 58 days in order to postpone her delivery while having a cervical dilation of 4-5 cm. the patient underwent c/s at the gestational age of 34 weeks because of reducing fetal movements and breech presentation. conclusion: because of many side effects of long term management with mgso4 and bed rest, this protocol isn't recommended for all patients.