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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Spermarche ： ウィキペディア英語版 Spermarche Spermarche—also known as semenarche—refers to the beginning of development of sperm in boys' testicles at puberty.〔''Adolescence and Emerging Adulthood: A Cultural Approach'', Jeffrey Jensen Arnett, N.J.: Prentice-Hall, 3rd edition, 2006. ISBN 978-0-13-195071-9〕 It contrasts with menarche in girls.〔''Adolescence'', E. Atwater, Englewood Cliffs, N.J.: Prentice-Hall, 3rd edition, 1992. ISBN 978-0-13-007469-0〕〔The onset of sperm production in pubertal boys. Relationship to gonadotropin excretion, H. E. Kulin, M. A. Frontera, L. M. Demers, M. J. Bartholomew, and T. A. Lloyd, ''American Journal of Diseases of Children'' 143 (1989), pp. 190–193. 〕 Depending on their upbringing, cultural differences, and prior sexual knowledge, boys may have different reactions to spermarche, ranging from fear to excitement.〔 Spermarche is one of the first events in the life of a male leading to sexual maturity. It occurs at the time when the secondary sexual characteristics are just beginning to develop.〔Onset of the release of spermatozoa (spermarche) in boys in relation to age, testicular growth, pubic hair, and height, C. T. Nielsen et al., ''Journal of Clinical Endocrinology & Metabolism'' 62 (#3, March 1986), pp. 532–535. 〕 The age when spermarche occurs is not easy to determine. However, researchers have tried to determine the age in various populations by taking urine samples of boys and determining the presence of spermatozoa. This process of determining the sperm content in urine is referred to as ''spermaturia''.〔 From various sources, it appears that spermarche occurs between 11–15 years of age.〔 == Context == In one study, boys were asked the circumstances in which their first ejaculation occurred. Most commonly this occurred via a nocturnal emission, with a significant number experiencing semenarche via masturbation. Less commonly, the first ejaculation occurred during sexual intercourse with a female partner.〔A Study of White Middle-Class Adolescent Boys' Responses to "Semenarche" (The First Ejaculation), James H. Stein and Lynn Whisnant Reiser, ''Journal of Youth and Adolescence'' 23 (#3, 1994), pp. 373–384.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spermarche」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.