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Hormonal changes: The release of hormones such as oxytocin, prostaglandins, and estrogen can trigger the onset of labor by causing the uterus to contract and the cervix to soften and thin out.
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Fetal maturity: As the fetus grows and matures, it produces hormones that signal to the mother’s body that it is ready for birth. This can include the release of cortisol, which can stimulate the mother’s body to begin labor.
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Stretching of the uterus: As the baby grows, the uterus stretches and becomes more irritable, which can trigger contractions and the onset of labor.
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Genetics: There is some evidence to suggest that genetic factors may play a role in the onset of labor. For example, some women may be more genetically predisposed to experience labor at a certain time or in a certain way.
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External factors: Certain external factors, such as stress, physical activity, and sexual activity, may also play a role in triggering the onset of labor.
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