Final answer:
The onset of labor in a class could include discussions on placental aging, pressure on the cervix from the baby's head, and uterine muscle stretching due to the fetus positioning. These are key factors that lead to the initiation of labor contractions, cervix dilation, and the eventual birth of the newborn.
Step-by-step explanation:
The faculty member teaching a class on the onset of labor should include several factors that can initiate the process. The correct factors the faculty member will likely discuss are:
- Placental aging: As the placenta ages, its functionality changes, releasing signals that can prompt the onset of labor.
- Pressure on the cervix: The baby's head positioning and the pressure against the cervix can stimulate the release of oxytocin, which stimulates contractions.
- Uterine muscle stretching: The stretching of the myometrium and cervix by a full-term fetus in the vertex (head-down) position can stimulate uterine contractions and begin the labor process.
These factors lead to various physiological changes, including contractions that serve to dilate the cervix and expel the newborn, followed by the delivery of the placenta.