Final answer:
The stage of labor that involves full dilation of the cervix to about 10 cm and ends with the delivery of the baby is known as Stage 2, following which Stage 3 involves the delivery of the placenta.
Step-by-step explanation:
The stage of labor that begins with dilation and complete cervical effacement and ends with the delivery of the neonate is Stage 2. This stage follows after the first stage, which involves early cervical dilation. In Stage 2, the cervix is dilated to about 10 cm allowing for the expulsion of the baby. The uterus contracts, and usually, the person giving birth actively pushes by compressing their abdominal muscles to help deliver the baby. The third stage of labor commences after the baby is born and involves the delivery of the placenta and associated fetal membranes.