约翰内斯堡黑白人种女孩的青春期发育

Pubertal development in black and white Johannesburg girls.

作者信息

Chaning-Pearce S M, Solomon L

出版信息

S Afr Med J. 1987 Jan 10;71(1):22-4.

Abstract

A study of the sexual maturation of 362 black and 355 white girls was conducted in Johannesburg in 1976 and 1977. It was found that the first sign of breast development occurs at the same mean age of 11.5 years for both groups, but that white girls develop pubic hair and experience menarche some 9 months earlier than black girls. The menarche in black girls occurs at a younger age than that recorded in the 1960s. The average black girl reaches full maturity later and has a longer maturational period than her white contemporary. In addition the time-span between maturational events in black girls differs from that in white girls.

摘要

1976年和1977年在约翰内斯堡对362名黑人女孩和355名白人女孩的性成熟情况进行了一项研究。结果发现，两组女孩乳房发育的首个迹象出现的平均年龄均为11.5岁，但白人女孩阴毛发育和初潮比黑人女孩早约9个月。黑人女孩的初潮年龄比20世纪60年代记录的要小。与同龄白人女孩相比，黑人女孩平均达到完全成熟的时间更晚，成熟阶段持续的时间更长。此外，黑人女孩成熟过程中各阶段的时间间隔与白人女孩不同。