To qualify as dysmenorrheic, the subjects had to have intrauterine pressure increases of greater than 40% after the first vasopressin infusion and return to within 15% of baseline within 60 minutes.

• 在抗利尿激素第一次投予后，子宫内压增加超过40%25，并在60分钟内回复到基线值的15%25以内，如此才能符合经痛的定义；