许多国家在十九世纪后期就观察到了初潮年龄的变化,发现初潮年龄有长期提前的趋势。但近年来也有人认为在欧洲及北美初潮年龄提前的速度已经减慢甚至仃止。在我国北京、辽宁等地也有类似的报道。同时发现初潮发生尚与季节有关。本文试图探讨在上海地区月经初潮的趋势分布及季节分布情况。 Many countries observed changes in the age of menarche in the late nineteenth century and found that there was a long-term trend of menarche. However, in recent years, some people think that the rate of early menarche in Europe and North America has slowed down or even stopped. In China, Beijing, Liaoning and other places have similar reports. Also found that the occurrence of menarche is still related to the season. This article attempts to explore the trends in the distribution of menarche and seasonal distribution in Shanghai.