Which dilation measurement is exclusively associated with the active phase of labor?

The active phase of labor is characterized by progressive cervical dilation, typically occurring from around 6 cm to 10 cm as contractions become stronger and more regular. The measurement of 5-7 cm does involve the active phase since it includes the higher end of the latent phase (which runs from 0-6 cm) and continues into the active phase.

However, the specific range that aligns most distinctly with the active phase of labor is typically regarded as beginning around 6 cm. Therefore, the 5-7 cm range can be considered transitional since it spans the end of the latent phase and the beginning of the active phase. This range allows for a transition period where labor patterns become more intense and effective.

In this context, understanding that the dilation measurements correlate with labor phases is critical. The active phase generally starts around 6 cm, moving towards full dilation, which leads to the implication that this stage is marked by greater intensity of contractions and more rapid progress.

Therefore, while other ranges may touch upon the active phase, the measurement of 5-7 cm is most distinctly and exclusively associated with the transition into active labor.