Preterm labor

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Summary of Preterm labor

Preterm birth is defined as the birth of a baby at less than 37 weeks gestational age. The earlier a baby is born, the greater the risk, variety, and severity of complications to the infant's health, particularly to the respiratory system. The earliest gestational age at which a baby has at least 50% chance of survival is approximately 24 weeks.

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Preterm labor

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Preterm labor

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A 31-year-old G2P1 woman at 30 weeks gestation presents to the emergency department with uterine contractions every three minutes. She says that these started early this morning and they have gotten more severe and more frequent. She denies any vaginal bleeding or big rush of fluid. She is still able to feel fetal movements. She is placed on monitors, which show coordinated contractions every three minutes as well as normal fetal heart rhythms. Her cervix is long and only dilated to 1 cm. She is given a medication to attempt to delay delivery in order to administer corticosteroids for fetal lung maturation. What is a potential mechanism of action of this medication?

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