呼和浩特地区蒙,汉族女生月经初潮年龄的变化

作者于１９８７，１９９０，１９９３年份３次调查了呼和浩特区４个群体的月经初潮年龄，并按出生年份和初潮年份分组研究了４个群体月经初潮年龄的变化趋势，研究结果显示：（１）１９６３至１９７２年出生的蒙，汉族女性平均妆潮年龄（ＭＭＡ）提前速度较快，１９７２年后出生的城市女性ＭＭＡ提高速度已减慢，农村女性提前速度仍较快；（２）１９６３于１９７７年出生的的农村女性ＭＭＡ提前速度略快于城市；（３）蒙古族女性ＭＭ

VARIATION OF MENARCHEAL AGE OF MONGOL AND HAN GARLS IN HUHEHOT REGION

Investigation on the mcnarchcal age of 4 groups in Huhchot region were made in 1987,1990, 1993, rcspcctivcly. Statistics were made in groups arranged according to birth year andmenarchcal year. Results showal that: 1)The process of moving up of MMA of girls born during1963-1972 of both nationalitics in Huhchot is quicker in recent years. The process of moving upof MMA of urban girls born after 1972 slowed down, but that of 'rural girls is still quicker;2)The process of moving up of MMA of rural girls born during 1963-1977 is slightly higherthan that of urban ones; 3)MMA of Mongol girls is usually earlier than Han who live in thesame environment; 4)Statistics of data of 1993 by status quo method and retrospective methodshowed that the MMA of both nationalitics in Huhchot has already reached the level ofeconomically dcvclopcd large cities in China and has been near to the lowest limit or MMA controled by genetic factors.