Final answer:
During the second stage of labor, a nulliparous woman experiences the expulsion of the baby from the uterus through strong contractions and active pushing.
Step-by-step explanation:
During the second stage of labor, a nulliparous woman, who has never given birth before, would most likely experience the expulsion of the baby from the uterus. This stage is characterized by strong uterine contractions and the mother actively pushing to aid in the delivery. It typically lasts for a shorter time compared to subsequent labors. After the baby is born, the placenta will eventually be expelled in the last stage of labor.