What marks the end of the first stage of labor?

The end of the first stage of labor is characterized by cervical dilation reaching 10 cm. This stage is focused on the gradual dilation and effacement of the cervix as a response to the contractions of labor. Full dilation, which is 10 cm, signifies that the cervix is completely open, allowing the fetal head to descend into the birth canal in preparation for delivery.

At this point, active labor typically progresses from the earlier dilation phases, often described as latent (up to about 6 cm) and active labor (approximately 6 cm to 10 cm). Once the cervix is fully dilated to 10 cm, the second stage of labor begins, which involves the pushing and delivery of the infant.