Susman Elizabeth J, Houts Renate M, Steinberg Laurence, Belsky Jay, Cauffman Elizabeth, Dehart Ganie, Friedman Sarah L, Roisman Glenn I, Halpern-Felsher Bonnie L
Department of Biobehavioral Health, The Pennsylvania State University, Health and Human Development Building, Room E-315, University Park, PA 16802, USA.
Arch Pediatr Adolesc Med. 2010 Feb;164(2):166-73. doi: 10.1001/archpediatrics.2009.261.
To identify ages when adolescents were in sexual maturity stages 2 through 5; to explain the relations between breast (girls), genital (boys), and pubic hair (girls and boys) development between ages 9(1/2) and 15(1/2) years; and to evaluate synchrony of pubertal development across characteristics.
Annual pubertal assessments.
Ten locations in the United States.
A total of 859 adolescents (427 boys [49.7%] and 432 girls [50.3%]; 737 white [85.8%] and 122 black [14.2%]).
Changes in the 5 stages of breast, genital, and pubic hair development.
Girls were in breast maturity stages 2 and 3 earlier than comparable pubic hair stages. Although breast development in girls started earlier than pubic hair development, girls completed breast and pubic hair development at approximately the same age. Black girls were in all stages of breast and pubic hair development earlier than white girls. Boys were in stages 2, 3, 4, and 5 of genital development before the comparable pubic hair stage. In boys, genital development started earlier than pubic hair development, but pubic hair development was completed in less time. Black boys were in genital and pubic hair development about 7 months earlier than white boys. Black and white boys completed genital development in approximately 4(1/2) years, but black boys took approximately 6 months longer than white boys to complete pubic hair development. At stage 2, for 66.2% of girls, breast development preceded their pubic hair development; for 91.1% of boys, genital development preceded their pubic hair development.
The results of this study are useful in understanding normative variation in the timing and change in the development of secondary sexual characteristics at puberty. They will help identify adolescents with atypical changes in sexual maturation and unusual progression of sexual maturation and growth disorders.
确定青少年处于性成熟2至5期的年龄；解释9.5至15.5岁之间女孩乳房、男孩生殖器以及女孩和男孩阴毛发育之间的关系；并评估青春期发育各特征之间的同步性。
年度青春期评估。
美国的十个地点。
共859名青少年（427名男孩[49.7%]和432名女孩[50.3%]；737名白人[85.8%]和122名黑人[14.2%]）。
乳房、生殖器和阴毛发育5个阶段的变化。
女孩乳房成熟2期和3期早于相应的阴毛发育阶段。虽然女孩乳房发育早于阴毛发育，但女孩乳房和阴毛发育在大致相同年龄完成。黑人女孩乳房和阴毛发育的所有阶段均早于白人女孩。男孩生殖器发育2期、3期、4期和5期早于相应的阴毛发育阶段。在男孩中，生殖器发育早于阴毛发育，但阴毛发育完成时间更短。黑人男孩生殖器和阴毛发育比白人男孩早约7个月。黑人和白人男孩生殖器发育均在约4.5年完成，但黑人男孩完成阴毛发育比白人男孩大约多花6个月。在2期，66.2%的女孩乳房发育先于阴毛发育；91.1%的男孩生殖器发育先于阴毛发育。
本研究结果有助于理解青春期第二性征发育时间和变化的正常变异。它们将有助于识别性成熟有非典型变化、性成熟进展异常以及生长障碍的青少年。
