Final answer:
The nurse should first observe for a prolapsed cord or meconium stained fluid when a woman's membranes rupture during labor.
Step-by-step explanation:
The nurse should first observe for a prolapsed cord or meconium stained fluid when a woman's membranes rupture during labor. A prolapsed cord occurs when the umbilical cord slips through the cervix and precedes the fetus. This is an emergency situation that requires immediate intervention to prevent harm to the fetus. Meconium stained fluid, which is greenish or yellowish in color, indicates that the baby has passed stool in utero, and it may be a sign of fetal distress.