In all, the dozen studies, drawn from an extensive search of published material, involved almost 4000 women with IBD and more than 320, 000 people without the condition, with whom they were compared.

• 从以往发表的研究材料抽出的12份研究包括了接近4000个有炎症性疾病的妇女和超过与之对比320，000个没有炎症性疾病的患者。