was in the neonatal intensive care unit (NICu) for 3 weeks and discharged without sequelae.
The second
preterm infant, a boy, was delivered 2 years ago at 35 weeks' gestation and spent 4 days in the hospital
before discharge. She has no other risk factors for preterm labor. Vital signs are normal. Her vaginal exam-
ination findings were essentially within normal limits: cervix long, closed, and thick; membranes intact.
Abdominal examination revealed that the abdomen was nontender, with fundal height at 29 cm, fetus in
a vertex presentation.
While you are waiting for laboratory results, what therapeutic measures do you consider?