[A secular trend in age at menarche in Japan].
Moriyama
M
M
Kashiwazaki
H
H
Suzuki
T
T
D000367:Age Factors; D001208:Asia; D003710:Demography; D019049:Developed Countries; D005202:Asia, Eastern; D007564:Japan; D008572:Menarche; D008598:Menstruation; D011153:Population; D011154:Population Characteristics; D012098:Reproduction
Age Factors; Asia; Demographic Factors; Developed Countries; Eastern Asia; Japan; Menarche; Menstruation; Population; Population Characteristics; Reproduction