Final answer:
In the active phase of labor, contractions are intense and lasting 60-90 seconds.
Step-by-step explanation:
In the active phase of labor, contractions are intense and lasting 60-90 seconds. Initially, contractions may occur every 3-30 minutes and last for 20-40 seconds. However, as labor progresses, contractions become more frequent, occurring as frequently as every 1.5-2 minutes, and last for a full minute.