As uterine contractions push the fetus against the cervix during parturition, oxytocin release from the posterior pituitary is reflexively increased, resulting in more uterine contractions.

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Quizplus · Accepted Answer

This is the positive feedback loop that helps to facilitate and progress labor. Uterine contractions push the fetus against the cervix, which stimulates the release of oxytocin from the posterior pituitary gland. Oxytocin then causes more intense and frequent contractions, which in turn further pushes the fetus against the cervix, leading to additional oxytocin release and so on. This positive feedback loop continues until the baby is born.

As Uterine Contractions Push the Fetus Against the Cervix During