<prompt> All of the following are contraindications to tocolysis except:ChorioamnionitisFetal distressAnencephalyPlacenta previa  <response>: Ans. is d, i.e. Placenta previaRef. Dutta Obs. 7e, p 319Contraindications to tocolysis Chorioamnionitis Advanced labor Abruption Congenital anomalies not compatible with life Preeclampsiaeclampsia Fetal distress IUFD Pregnancy 34 weeksAs far as placenta previa is concerned tocolysis is not contraindicated Management of patient with placenta previa and preterm labor:Tocolytic agent: Uterine contractions are common in patients with placenta previa. Since uterine contractions have the potential to, disrupt the placental attachment and aggravate the bleeding, most obstetricians favor the use of tocolytic agents in the expectant management of patient with placenta previa. High risk pregnancy Fernando ariasMost commonly used tocolytics in case of placenta previa.-Nifedipine-Magnesium sulphateTocolytics which are not used-Terbutaline and Ritodrine: They cause tachycardia and make the assessment of patients pulse rate unreliable.-Indomethacin: It causes inhibition of platelet cyclo-oxygenase system and prolongs the bleeding time. 