A Psycological Study of Sexual Development in Japanese Female

青春期早期是一个生理、心理和社会都发生显著变化的时期。我们研究的主要目的是考察生理和心理因素如何相互作用来影响女性青春期的性发展。本研究旨在调查日本73,309名10岁至15岁女性的性发育情况。月经初潮是女性性成熟开始的主要指标。根据Qeo状态数据，通过概率分析估算了日本女性的平均月经初潮年龄。这些数据是在1997年2月从日本所有47个县的学校中随机收集的。在欧洲和美国，平均初潮年龄是有记录以来最低的，为12岁零2.0个月，标准偏差为1岁零1.2个月。在日本，从1977年到1987年，从我们以往研究的12.5年左右，停止了向早期性成熟的长期趋势或加速。但日本性成熟提前的新趋势是从我们的新研究开始的。在47个预产区中，最低的月经初潮平均年龄为冲绳县的11岁零11.1个月。与冲绳县相比，滋贺县月经初潮的平均年龄最高，为12岁4.8个月。日本女性的发育存在地方性差异。根据我们的研究分析，青春期的变化与每周吃早餐的次数、与父母交谈的频率以及自我性别认同有关。结论：女性的心理和行为随着青春期的变化而变化。

Puberty on early adolescence is a period of pronounced biological, psychological, and social changes. The main purpose of our study is to examine how biology and psychological factors interact to affect the development of sexuality in females' puberty. The present study aims to investigate the sexual development in japanese 73,309females, from 10years to 15years old. The menarche stands as our primary indicator of the onset of sexual maturity in females. The mean menarcheal age of japanese female has been estimate by probit analysis from status qeo data. The data have been collected at random from schools in all 47prefectures in Japan during the February in 1997. The mean menarcheal age in the total sample was the lowest on the records for Europe and the USA,it was 12year and 2.0month, with a S.D.of 1year and 1.2month.In Japan, the secular trend or accerelation to earlier sexual maturation stopped from 1977 to 1987 around the 12.5years from our past research. But the new seular trend to earlier sexual maturation in Japan began from our new research. In the 47prefetures, the most lowest mean age at menarche was 11year and 11.1month of the Okinawa prefecture. In contrast with Okinawa prefecture, the highest mean age at menarche was 12year and 4.8month of the Shiga prefecture. There were local difference in the development of japanese females. And the mean age at menarch in Japan are thought to decrease to 12.0year from now on.The pubertal change relates to times of breakfast per week, frequecies of speaking with parents, and self sexual identity from the analysis of our research. In coclusion, it can be seen that females change psychologically and behaviorally with the changes of puberty.