In the latent phase of labor, what is the dilation range?

In the latent phase of labor, the dilation typically ranges from 0 to 3 cm. This phase is the early part of labor, where the cervix begins to efface and open in preparation for delivery. During this stage, contractions become more frequent and might be mild to moderate in nature, but they are generally not very painful.

Option B, which suggests a dilation range of 0-4 cm, extends slightly beyond the typical range for the latent phase and includes early active labor. The standard definition recognizes that the latent phase specifically covers up to 3 cm, while the active phase begins as soon as the cervix is dilated to 4 cm and contractions become more intense and regular. Understanding these phases of labor is crucial for monitoring progress and determining appropriate interventions.