Answer
Some research has shown that the most important trigger of labor is a surge of hormones released by the fetus.
Work Step by Step
Some research has shown that the most important trigger of labor is a surge of hormones released by the fetus. In response to this hormone surge, the muscles in the mother’s uterus are changing, allowing the mother's cervix to open.
When a woman goes into labor on her own, it’s a powerful signal that her baby is ready to be born and that her body is ready for labor.
