Height and weight at menarche and a hypothesis of menarche

Abstract

. (1971). Archives of Disease in Childhood, 46, 695. Height and weight at menarche and a hypothesis of menarche. Height and weight at menarche were estimated by interpolation of longitudinal growth data for 181 girls. Mean weight at menarche, about 48 kg, does not change as menarcheal age increases, whereas mean height increases significantly. Early and late menarcheal girls gain the same amount of height, about 22 cm, and the same amount of weight, about 17 kg, in the interval from the initiation of the adolescent spurt to menarche, though late maturers grow at slower rates during the spurt, including the year of menarche. A hypothesis of a direct relation between a critical weight and menarche is proposed. Such an interaction would explain the delaying effect of malnutrition on menarche and the secular trend to an earlier menarche.Though there are many general observations that girls at menarche are taller and heavier than those of the same age who have not achieved menarche (Tanner, 1962), there are no published data on actual height and weight at menarche, as far as we know. In a preliminary report we gave data for height and weight at menarche obtained for each girl by interpolation of the data of three longitudinal growth studies. At menarche, the mean weight of early and late menarcheal girls did not differ, whereas late menarcheal girls were significantly taller than girls with early menarche (Frisch and Revelle, 1970).Menarche occurs after the initiation of the adolescent growth spurt and the attainment of the maximum rates of growth in height and weight (Frisch and Revelle, 1969b;Simmons and Greulich, 1943). Our analysis of the same longitudinal growth studies for the height and weight of each child at the time of spurt initiation (Frisch and Revelle, 1971), and the maximum rates of growth (Frisch and Revelle, 1969b) also showed that the mean weight of early and late maturing girls did not differ at each of these events, whereas late maturers were significantly taller at each event.These results account for the many observations that early maturers have more weight for height before, and throughout the adolescent spurt, including the year of menarche (Tanner, 1962).Received 16 March 1971. It was unexpected, however, that three of the major events of adolescence were related to an unchanging mean weight. This paper gives additional findings of our analysis of height and weight at menarche as a function of age of menarche. A hypothesis of menarche and an explanation of the secular trend to an earlier menarche (Tanner, 1966;Marshall and Tanner, 1968) are proposed. MethodWe are grateful to Dr.

A tríade da atleta: posicionamento oficial

“…A regulação das células que secretam esse hormônio é o foco das pesquisas atuais nessa área 21,86,87 . Na década de 70, um baixo peso corporal 94 e um baixo percentual de gordura corporal 95 foram colocados como causas de amenorréia. Pesquisas subseqüentes descartaram essas hipóteses e indicaram outros fatores envolvidos 16,[96][97][98] .…”

Pubertal development in obese children and adolescents

“…4 Simultaneously, the prevalence of obesity in childhood and adolescence has increased dramatically worldwide. [5][6][7][8][9] The established observation that overweight girls tend to mature earlier 10 and the historically evolving hypothesis of a critical degree of body fatness for the onset of menses, 11,12 suggests linkage between these phenomena. In fact, large cross-sectional studies in some populations show significant correlations between obesity in girls, earlier development of pubic hair, higher Tanner breast stages, 13 and earlier age at menarche, 2,14 respectively.…”

Delayed puberty caused by hyperthyroidism in ram lambs is not a result of suppression in body growth

“…Another explanation for retarded testicular growth in hyperthyroidal lambs could be provided by the critical body mass hypothesis (Frisch & Revelle, 1970, 1971Frisch, 1972) which states that puberty is triggered when animals reach a certain body weight. However, the validity of the critical weight concept has been questioned (Glass, Harrison & Swerdloff, 1976;Glass & Swerdloff, 1980;Glass, Anderson, Herbert & Vigersky, 1984;Kulin, Bwibo, Mutie & Sautner, 1982) (Chandrasekhar et al, 1985).…”