What are the three periods of labor and delivery and what are the main actions to be taken during each period? First period: dilation Second period...

What are the three periods of labor and delivery and what are the main actions to be taken during each period?
First period: dilation
Second period: expulsion
Third period: dequitation
The first period is characterized by regular uterine contractions and progressive cervical dilation from 4 cm.
During the second period, the baby is born and the mother should be encouraged to push during contractions.
The third period begins after the baby is born and ends with the expulsion of the placenta and fetal membranes.