Statistics show that the incidence of alzheimer's disease in women is about 10 percent higher than in men.

统计数据显示，女性老年痴呆症的发病率高出男性约10%。

A new study from Kaiser permanente explains that it has to do with women's own biology.

美国凯撒永久医疗集团的一项新研究解释称，这与女性自身的生理特征有关。

女性老年痴呆比男性比例大　　

Late menarche age or early amenorrhea age are the causes of high incidence of the disease.

初潮年龄晚或闭经年龄早都是该病的高发原因。

In other words, the shorter the time a woman's body produces estrogen, the higher her risk.

换句话说，体内雌激素分泌时间越短，女性患老痴的风险越高。

The researchers studied 16,000 women with an average age of 51.1 years to examine the association between estrogen production time and the risk of dementia.

研究人员以1.6万名平均年龄51.1岁的女性为对象，调查分析了雌激素分泌时间与老痴风险的关联性。

The results showed that women who had menarche at a later age than 16 had a 23 per cent higher risk of developing dementia than those who had menarche at an average age of 13.

结果表明，与初潮年龄平均为13岁的女性相比，初潮年龄晚于16岁的女性，老痴风险高23%。

Similarly, women with natural amenorrhea under the age of 47.4 had a 19 percent higher risk.

同样，自然闭经年龄不到47.4岁的女性，老痴风险高19%。

In addition, the risk increased by 20 percent for those who had been fertile for less than 34.4 years, and by 8 percent for those who had undergone hysterectomy.

此外，生育期时长少于34.4年者，老痴风险上升20%，接受过子宫摘除术者，该风险上升8%。

雌激素分泌影响女性　　

Researchers say the shorter a woman's lifetime of estrogen in her body, the more likely she is to develop an obsession.

研究人员表示，女性一生中，雌激素在体内分泌时间越短，越容易患上老痴。

This is because estrogen has the ability to repair brain cells and protect the brain, thereby reducing the risk of dementia.

这是因为雌激素具有脑细胞修复功能，对大脑起到保护作用，从而降低老痴风险。