What stage of labor is marked by the onset of labor pains?

The first stage of labor is characterized by the onset of labor pains, which are often the first physical signs that a woman is going into labor. During this stage, the body prepares for delivery by undergoing significant changes, including the softening and dilation of the cervix. This stage is further divided into early labor (latent phase) and active labor, during which the contractions become more regular and stronger, leading up to full cervical dilation. Understanding this stage is crucial for monitoring progress in labor and providing appropriate support to the laboring person.