1. Any of the distinct phases of childbirth, typically divided into three stages: dilation, expulsion, and placental delivery
The first labor stage involves cervical dilation and can last several hours.
O primeiro estágio do trabalho de parto envolve a dilatação cervical e pode durar várias horas.
2. A specific phase characterized by particular physiological changes and progression toward delivery
During the second labor stage, the mother begins active pushing.
Durante o segundo estágio do trabalho de parto, a mãe começa a fazer força.