Final answer:
Janine is administered an IV infusion of pitocin to help progress her labor. The newborn's first breath alters the circulatory pattern.
Step-by-step explanation:
Janine is administered an IV infusion of pitocin because her cervix is only dilated 2 cm and her amniotic sac is intact, indicating that her labor is not progressing. Pitocin, a synthetic form of the hormone oxytocin, stimulates uterine contractions and helps to progress labor.
When a newborn takes their first breath, the circulatory pattern changes. The closure of the ductus arteriosus and the foramen ovale, along with the increase in blood pressure, redirect the blood flow to the lungs for oxygenation, establishing the normal circulatory pattern.