The series of processes by which the fetus and other products of pregnancy are expelled from the uterus.
In pregnancy, the events and actions involved in bringing forth a baby, from the beginning of the dilation (widening) of the cervix to the expulsion of the placenta (afterbirth); also the period in which these activities occur.
Process by which a baby is born and the placenta is expelled from the uterus. Labor has three stages: the first, or stage of dilation, characterized by contractions of the uterine wall and dilatation of the opening of the cervix; the second, or stage of expulsion, during which the baby is born; and the third, or afterbirth stage, in which the placenta is expelled. The average duration of labor is about 13 hours in first pregnancies (12 hours in first stage, 1 hour in second, few minutes in third) and about 8 hours in subsequent pregnancies.
A series of physiological changes in a woman that allow for the delivery of a fetus through her birth canal. Changes in hormone levels appear to cause the start of labor, although the exact cause is unclear. The duration of labor varies for each woman and each birth.
In pregnancy, the process that begins with the onset of repetitive and forceful uterine contractions sufficient to cause dilation of the cervix and ends with delivery of the products of conception.
The work of pushing the fetus out of the mother.
Labor is the physiological process in which the uterus undergoes contractions, while the cervix dilates to facilitate the passage of a baby through the birth canal.