Final answer:
The woman is in the active phase of the first stage of labor with 4 cm of dilation and uterine contractions every 3.5 to 4 minutes.
Step-by-step explanation:
According to the information given, the woman is 4 cm dilated and experiencing uterine contractions every 3.5 to 4 minutes. This indicates that she is in the first stage of labor, specifically in the active phase. In this phase, the cervix continues to dilate from 4 to 7 cm. The contractions become stronger and more regular, occurring every 3 to 4 minutes.