Definitions for "Active labor"
the second phase of the first stage of labor. Active labor begins when the cervix is 3-4 centimeters dilated. During active labor, the contractions are stronger and occur more often than during the early phase (latent phase) of stage one. Toward the end of this phase, the cervix dilates from 7-10 centimeters.
The normal progress of the birth process, including tightening of the uterus, cervical dilation, and descent of the fetus into the birth canal.
Thinning and opening of the cervix, usually between 4–10 centimeters, with contractions typically 2–5 minutes apart