The most clinically useful test to differentiate women who are at high risk for preterm delivery from those who are not is in cervical or vaginal secretions.
USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
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?