Thys-Jacobs believes that PMS sufferers might have normal calcium levels in their blood and urine----but only because parathyroid-hormone levels are abnormally high and the hormone is continually extracting calcium from their bones.

• 泰思-雅可布斯认为经前综合症患者可能血液和尿液里的钙含量正常----只是由于甲状旁腺激素高得异常，这种激素不断从骨头里提取钙，才造成这种症状。