Active Labor Begins.

Active Labor Begins.
Stage 2 of labor begins with rupture of the chorioallantoic membrane. This relieves some of the pressure and active labor pauses. As labor resumes the blueish amniotic sac appears. (Stage 1 is the stage of preparation, characterized by relaxation of the pelvic ligaments, distension of the teats, dilation of the cervix, and restless behavior.)

Utrecht (1976)