The hormone [[Pituitary Gland - Anatomy & Physiology#Oxytocin|'''Oxytocin''']] causes uterine contraction. During parturition, the uterus stretches. The stretch causes nerve impulses to send signals to the hypothalamus, increasing the oxytocin levels released. This in turn increases uterine contraction, and the cycle continues. | The hormone [[Pituitary Gland - Anatomy & Physiology#Oxytocin|'''Oxytocin''']] causes uterine contraction. During parturition, the uterus stretches. The stretch causes nerve impulses to send signals to the hypothalamus, increasing the oxytocin levels released. This in turn increases uterine contraction, and the cycle continues. |