Final answer:
The stages of labor are stage one, where the cervix thins and dilates; stage two, where the baby is expelled; and stage three, where the placenta is delivered.
Step-by-step explanation:
There are three stages to labor. During stage one, the cervix thins and dilates, eventually reaching a dilation of about 10 cm. In stage two, the baby is expelled from the uterus through contractions and the mother pushing. Finally, in stage three, the placenta is delivered after the baby is born and has completely disengaged from the uterine wall. Synthetic oxytocin may be administered if labor stops before reaching stage two.