Stage 4 Of Birth. Furthermore, what are the stages of pregnancy? The sensorimotor stage (birth to 2 years) babies from birth to 2 years of age use their senses and.

During active labor, your cervix will dilate from 6 centimeters (cm) to 10 cm. The third stage initiates after the fetus is delivered and ends when the placenta is delivered. Using forceps or other assistance during birth;