Which term best describes the labor stage from its onset until cervical dilation reaches 4-6 cm?

The labor stage from its onset until cervical dilation reaches 4-6 cm is best described as the latent phase. This stage is characterized by the beginning of regular contractions and gradual cervical changes, which typically result in dilation from 0 cm to about 4-6 cm. During the latent phase, contractions may start out irregular and gradually become more consistent. Women in this phase often experience early labor signs and may feel varying levels of discomfort, but this phase generally allows for a more extended duration before active labor begins.

In contrast, the active phase is defined as starting when cervical dilation reaches around 4-6 cm and continues until full dilation at 10 cm. The transition phase follows the active phase, occurring as women approach full dilation, and is noted for stronger, more frequent contractions. The second stage of labor refers to the period after cervical dilation is complete (10 cm) and focuses on the descent and birth of the baby. These distinctions of labor phases are important for appropriate assessment and management in a clinical context.