Showing papers on "Menarche published in 1977"
TL;DR: Evidence of a rather strong genetic regulation of the occurrence of puberty was obtained in the analysis and the maximal height or weight gain seems to be, at least in girls, less influenced by genetic factors than the age at which it appears.
Abstract: A twin study on the significance of genetic factors for the variation in peak height and peak weight velocity, as well as in age at menarche and the development of secondary sex characteristics, is presented. Evidence of a rather strong genetic regulation of the occurrence of puberty was obtained in the analysis. The maximal height or weight gain (in cm/year of kg/year) seems to be, at least in girls, less influenced by genetic factors than the age at which it appears.
69 citations
TL;DR: Fertility among females age 15-19 may be expected to decrease in the future if this pattern continues, and body weight appears to be 1 of the most important factors for the determination of onset of menarche.
Abstract: A survey of 1, 155 girls aged 10 through 20 was conducted in a rural area of Bangladesh in March, 1976, to assess the impact of nutritional status on the onset of menarche and the association between age at menarche and age at marriage. In recent years there has been an increased age at onset of menarche which appears to have been associated with malnutrition caused by war, postwar inflation, floods, and famine in the period 1971–76. Body weight was highly correlated with the age of onset of menarche. A seasonal trend in onset of menarche was noted with the peak occurring in the winter months corresponding to the largest annual rice harvest. An increased age of marriage was also noted, which may be correlated with the increased age of menarche.
55 citations
TL;DR: A retrospective study of benign breast tumor in a general population was conducted in Washington County, Maryland, finding that fibroadenoma was not associated with most of the risk factors of breast cancer.
Abstract: To see if the risk factors associated with fibroadenoma and cystic disease were similar to those reported for breast cancer, a retrospective study of benign breast tumor in a general population was conducted in Washington County, Maryland. The study population consisted of 320 white women 20 to 49 years of age who had had benign breast disease and 320 age-matched controls. More cystic disease cases than controls had the following characteristics, which had been reported to have been associated with breast cancer in other studies: higher socioeconomic status; fewer pregnancies; and a lack of association with lactation patterns. Nulliparity, late natural menopause and a maternal history of breast cancer were also more common among cystic cases than controls, although these differences could have occurred by chance. Cystic disease cases and controls did not differ with respect to other factors associated with breast cancer, such as early age at menarche, late age at first pregnancy, and negative history of artificial menopause. In contrast to cystic breast disease, fibroadenoma was not associated with most of the risk factors of breast cancer.
51 citations
TL;DR: Breast cancer risk was found to increase with increasing height, weight, and Quetelet index, and it was also elevated in females reporting menarche at ages.
51 citations
TL;DR: It is suggested that age at first conception, a biologically more relevant index than menarche, should be considered as a potentially important adaptive variable when describing primate species.
Abstract: 5 female and 3 male patas monkeys and 6 female and 3 male talapoin monkeys matured in a captive breeding colony. Age at puberty is given, and some variation discussed. The talapoin, a very small monkey, becomes adult at 4 1/2 years for females, 1 or 2 years later for males. The patas, a rather large monkey, becomes adult at 2 1/2 years, for females, and 1 or 2 years later for males. Both these ages for puberty differ from data for the rhesus monkey which has been accepted as generalizable to all Old World monkeys. Possible causes of differences between species in average age at puberty are discussed, including nutrition, environmental inconstancy, and relative size of infant and mother. It is suggested that age at first conception, a biologically more relevant index than menarche, should be considered as a potentially important adaptive variable when describing primate species.
45 citations
TL;DR: The median age at menarche (estimated by probit analysis) for Oaxaca girls was 14·27±0.20 years, about 0·5 year later than that for the rural sample from Tampico-Altamira, Tamaulipas (13·79±0·20 years), and approximately 1·5 years later than for girls from the four major urban centres in Mexico (12·55± 0·10, 12·61± 0.08, 12•75±0 ·10,12·76± 0 ·
Abstract: SummaryStatus quo menarcheal information was collected for a mixed urban colonia and rural sample of 315 girls in the Valley of Oaxaca, Mexico. Comparative status quo data for girls from four major urban centres in Mexico and for a rural sample were also analysed. Median age at menarche (estimated by probit analysis) for Oaxaca girls was 14·27±0·20 years, about 0·5 year later than that for the rural sample from Tampico-Altamira, Tamaulipas (13·79±0·20 years), and approximately 1·5 years later than that for girls from the four urban centres in Mexico (12·55±0·10, 12·61±0·08, 12·75±0·10, 12·76±0·07 years). The timing of menarche in Oaxaca girls is similar to that for rural Mayans in Guatemala. Ages at menarche for urban Mexican girls are somewhat lower than those for girls of North-west European ancestry and of North American girls of European ancestry.
35 citations
TL;DR: This study showed that growth retardation is still a problem; that irregular treatment and prolonged exposure to adrenal androgens or oestrogens, may lead to disturbance in hypothalamo‐pituitary‐gonadal function and may be the cause of delayed menarche, or menstrual irregularities in the case of the female.
Abstract: SUMMARY
21 years experience with management of seventeen cases of congenital adrenal hyperplasia due to 21-hydroxylase deficiency has been analysed with respect to growth, bone maturation and related events at puberty: age at menarche and the occurrence of menstrual irregularities, this study showed that growth retardation is still a problem; that irregular treatment and prolonged exposure to adrenal androgens or oestrogens, may lead to disturbance in hypothalamo-pituitary-gonadal function and may be the cause of delayed menarche, or menstrual irregularities in the case of the female. In males the start of puberty and its completion was within the normal range.
22 citations
TL;DR: A longitudinal study of a British cohort has collected information on puberty, judged by menarcheal age for the girls and the pubertal stage of the boys at age 14 3/4, and found no evidence that earlier-maturing young women became mothers at earlier ages than later maturers.
Abstract: SummaryA longitudinal study of a British cohort has collected information on puberty, judged by menarcheal age for the girls and the pubertal stage of the boys at age 14 3/4. This information has now been related to the ages at which these young people married and became parents. For the young men there was evidence of a direct relationship between degree of sexual maturity at age 14 3/4 and their ages at entry into marriage and fatherhood. For the young women, if pregnancy did not intervene between menarche and marriage, there was evidence of a direct relationship between menarcheal age and marriage age. But there was no evidence that these earlier-maturing young women became mothers at earlier ages than later maturers. This arose through the later-maturing young women having shorter first birth intervals than the earlier maturers. Premarital conceptions were also more prevalent amongst the later maturers.
20 citations
TL;DR: The mean age at menarche in 6252 girls from secondary schools in six areas of the Veneto (Northern Italy) in 1975-1976, was estimated by probit analysis as 12-77 +/- 0-038 years, which is the highest known for Italy.
Abstract: SummaryThe mean age at menarche in 6252 girls from secondary schools in six areas of the Veneto (Northern Italy) in 1975–1976, was estimated by probit analysis as 12·77±0·038 years. This mean is the highest known for Italy.Sexual maturation appears late in girls from large families and early in girls from small families: mean menarcheal ages were respectively 12·81±0·057 and 12·64±0·036 years.
17 citations
TL;DR: In the first post‐pill cycle, there was an average increase of 6 days in cycle length, however, in subsequent cycles, cycle length and regularity were comparable to pre‐pill norms in most cases.
TL;DR: A secular trend in age at menarche was examined for 1,333 women living in Sendai city and its surroundings by applying the birth-year cohort analysis and the cross-sectional probit analysis.
Abstract: A secular trend in age at menarche was examined for 1, 333 women living in Sendai city and its surroundings by applying the birth-year cohort analysis and the cross-sectional probit analysis. The trend toward younger menarcheal ages was consistently observed by both analyses, and it started off soon after the second World War. The speed was 0.11 year/year for the observation period of 1946 to 1966.
TL;DR: A longitudinal biometric study of the growth in height of the upper and lower segments of the body in 45 girls concludes that growth after the menarche is almost exclusively in the upper segment.
Abstract: The author has made a longitudinal biometric study of the growth in height of the upper and lower segments of the body in 45 girls. He concludes that growth after the menarche is almost exclusively in the upper segment. In 80 per cent of cases, the growth of the lower segment was less than 1.5 cms. The author shows that this residual growth depends on the maturity of the skeleton at the time of puberty. It is greater when skeletal maturity is delayed. Other important factors were the height of the child at the age of 8 and the growth rate between the ages of 8 and 10 years: the bigger the child, the smaller will be the amount of growth after the menarche. The first menstruation appeared earlier when the growth rate between the ages of 8 and 10 years was greater.
TL;DR: The present data are inconclusive as to whether the sensory deprivation imposed by deafness has an accelerating effect on menarche similar to that hypothesized for light deprivation in blind girls.
Abstract: SummaryUsing the status quo and retrospective methods, age at menarche was estimated for a sample of 212 deaf girls 7 through 20 years of age. Median age at menarche via probit analysis was 11·91 ± 0·25 years, while the mean based on recalled age in older girls (≥ 15·5 years) was 12·56 ± 0·16 years. These two estimates thus differ by approximately 0·6 years. The probit estimate of median age at menarche in deaf girls is similar to mean ages reported for blind girls. However, the retrospective age is later. Thus, the present data are inconclusive as to whether the sensory deprivation imposed by deafness has an accelerating effect on menarche similar to that hypothesized for light deprivation in blind girls.
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TL;DR: The relation between body weight, height and the commencement of menstruation was studied in 5324 girls aged 12--15 yr attending secondary schools in the province of Pordenone.
Abstract: The relation between body weight, height and the commencement of menstruation was studied in 5324 girls aged 12--15 yr attending secondary schools in the province of Pordenone. The mean age of menarche was 12 2/12 yr and varied little throughout the province. Weight and height appeared closely related to menarche. A threshold of 49.2 kg and 157.3 cm was noted. Attainment of these critical values was apparently the factor that influenced the age at which menstruation commenced.
TL;DR: During the prepubertal years the multifactorial influences on puberty include health, disease, family life, neuroendocrine integrity of the individual, and nltrition.
Abstract: The various factors that influence puberty and menarche reflect the total environment in which the youngster develops. These influences actually begin in intrauterine life and include genetics, hormones, and nutrition. During the prepubertal years the multifactorial influences on puberty include health, disease, family life, neuroendocrine integrity of the individual, and nltrition. In the female the culmination of the pubertal events is the occurrence of menarche.
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TL;DR: There were more women with hypertension and more never married women among the patients with ovarian cancer and it is suggested that endocrine factors influence the onset of ovarian cancer.
Abstract: A study of 149 patients with ovarian cancer compared to 149 age-matched women out of the population is analyzed. There were no statistically significant differences in nearly all extragenital and all gynaecological diseases. No differences were found in menstrual history, history of hormonotherapy, age of menarche and menopause, number od nulliparous women, number of deliveries and abortions, radiation exposure, double primaries, blood groups, family history and consumption of nicotine. The findings in this study showed a difference in two variables: There were more women with hypertension and more never married women among the patients with ovarian cancer. It is not possible to define a group of high risk with these findings. It is suggested that endocrine factors influence the onset of ovarian cancer. Therefore these factors more should be taken into consideration in further epidemiological studies.
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