Age of puberty: Data from the United States of America

被引:102
作者
Lee, PA
Guo, SS
Kulin, HE
机构
[1] Penn State Univ, Milton S Hershey Med Ctr, Coll Med, Div Pediat Endocrinol,Dept Pediat, Hershey, PA 17033 USA
[2] Wright State Univ, Sch Med, Div Human Biol, Dept Community Hlth, Kettering, OH 45420 USA
关键词
age of onset of puberty; menarche; Tamer stages of puberty;
D O I
10.1034/j.1600-0463.2001.d01-107.x
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
In an attempt to determine whether the secular:trend toward an earlier onset of puberty has continued over recent decades in the United States of America, published reports concerning the age of attainment of pubertal events have been reviewed. Such reports are very limited and vary in both design and inclusive ages of study subjects. Among females, two recent large cross-sectional studies indicate that fifty percent of females in the United States attain Tanner breast stage 2 at 9.5 to 9.7 years of age. This is younger than previously thought, although adequate earlier studies of girls in the United States are not available for comparison. These two studies also indicate that about 14% of girls attain Tanner stage 2 while 8 years of age; one study extends earlier reporting that about 6% exhibit onset of breast development while 7 years of age. There is no evidence that the age of menarche or the attainment of adult (Tanner 5) breast development has decreased over the past 30 years. The data also suggest an earlier onset of Tanner stage 2 pubic hair but no change in attainment of stage 5. Among males, pubic hair may be appearing at younger ages, but data are inadequate or too inconsistent to allow firm interpretation. The lack of standardization of genital criteria of pubertal onset in the male makes any conclusions regarding secular trends impossible. In summary, earlier secular trends over recent decades related to better health, improved nutrition or socio-economic status, or any putative influence by endocrine disrupters cannot be verified.
引用
收藏
页码:81 / 88
页数:8
相关论文
共 11 条
[1]  
[Anonymous], WILLIAMS TXB ENDOCRI
[2]  
BIRO FM, 1995, J PEDIATR, V127, P70
[3]  
HARLAN WR, 1980, J PEDIATR-US, V96, P1074
[4]  
HARLAN WR, 1979, J PEDIATR-US, V95, P293
[5]   Secondary sexual characteristics and menses in young girls seen in office practice: A study from the pediatric research in office settings network [J].
HermanGiddens, ME ;
Slora, EJ ;
Wasserman, RC ;
Bourdony, CJ ;
Bhapkar, MV ;
Koch, GG ;
Hasemeier, CM .
PEDIATRICS, 1997, 99 (04) :505-512
[6]   Reexamination of the age limit for defining when puberty is precocious in girls in the United States: Implications for evaluation and treatment [J].
Kaplowitz, PB ;
Oberfield, SE .
PEDIATRICS, 1999, 104 (04) :936-941
[7]  
LEE P A, 1980, Journal of Adolescent Health Care, V1, P26, DOI 10.1016/S0197-0070(80)80005-2
[8]   VARIATIONS IN PATTERN OF PUBERTAL CHANGES IN GIRLS [J].
MARSHALL, WA ;
TANNER, JM .
ARCHIVES OF DISEASE IN CHILDHOOD, 1969, 44 (235) :291-+
[9]   VARIATIONS IN PATTERN OF PUBERTAL CHANGES IN BOYS [J].
MARSHALL, WA ;
TANNER, JM .
ARCHIVES OF DISEASE IN CHILDHOOD, 1970, 45 (239) :13-+
[10]  
ROCHE AF, 1995, J PEDIATR ENDOCR MET, V8, P11