Define 'tocolysis' and name two indications for tocolysis in obstetric care.

• A. Medication to suppress uterine contractions; to delay preterm birth due to immature fetal lungs or maternal conditions needing stabilization
• B. Surgical removal of the uterus; to prevent contractions
• C. Medication to stimulate uterine contractions; to hasten delivery
• D. Thermal therapy to manage fever in labor

Answer: (A)

Tocolysis is the use of medication to suppress uterine contractions, with the goal of delaying preterm birth for a short period. This delay allows time for fetal maturation and for stabilization or transfer of the mother if needed, rather than stopping labor forever.

Two common indications are: delaying birth when the baby is preterm due to immature lungs so interventions like antenatal corticosteroids can be given and the pregnancy can be continued safely; and delaying birth when maternal conditions require stabilization, such as hypertensive disorders or other obstetric emergencies where prolonging the pregnancy can improve maternal status or safety.