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At least 19 recordsLinked to original sources
PubMed2002

Menarche in scoliotic and nonscoliotic Mediterranean girls. Is there any relation between menarche and laterality of scoliotic curves?

UNLABELLED: There is a controversy in the current literature concerning the age at menarche between scoliotic and nonscoliotic girls. The aim of this study is to elucidate this issue in the Mediterranean school aged girls. MATERIAL AND METHODS: The menarche of 1,305 nonscoliotic girls (mean age 12,3 years, range 7,41 to 18,41 years, SD 2,5 years) and of 105 scoliotic girls (mean age 14.15 years, range 7.47 to 18.97 years, SD=2.7 years) was studied. These two groups originate from a total population of 4,535 schoolchildren who were examined during school screening (2,245 girls, 2,290 boys). The Angle of Trunk Inclination (ATI) greater or equal to 7 degrees, measured with the Pruijis Scoliometer was used as a pass-fail criterion for radiological examination. The diagnosis of scoliosis was defined as the finding of a Cobb angle greater or equal to 10 degrees on a standing postero-anterior radiograph of the spine. Statistical analysis was performed using the SPSS statistical program. RESULTS: 476 girls out of 1,305 nonscoliotic girls (36,50%, mean age 14,04 years, range 9.04 to 18,21 years, SD=1.59 years) had menarche (mean age at menarche 12,07 years, SD 1,35 years, range from 7,63 to 14,59 years), while the remaining 829 girls (63,50%, mean age 11,09 years, SD 2,09 years, range 7,41 to 18,47 years) had not any. On the other hand, 77 out of the 105 scoliotic girls had menarche (73,33%, mean age 15,29 years, SD 1,54 years, range 11,35 to 18,97 years). The mean age at menarche of the scoliotic girls was 11,98 years, SD 1,49 years, range 7,7 to 16,72 years. Twenty-eight scoliotic girls had no menarche yet (mean age 10.99 years, range 7.41 to 17.24 years, SD=2.72). There was a predominance of right-sided primary curves in menarche positive scoliotic girls (61%), while menarche negative scoliotic girls showed mainly left sided primary curves (64,3%). This difference is statistically significant (p<0,05). The frequency of the various scoliotic curves in menarche positive scoliotic girls was as follows: right thoracic (32,5%), left lumbar (23,4%) and right thoracolumbar (15,6%) curves. The respective locations of scoliotic curves in girls without menarche were left lumbar (25%), left thoracolumbar (25%) and thoracic curves (14,3%) were equally distributed on both. Delayed onset of menarche or no menarche was observed in 4 scoliotic girls. Furthermore, 2 scoliotic girls mentioned that they had menarche after the age of 15 years and only after hormonal treatment. Despite of the apparent prevalence of the scoliotic girls in the menarche positive population, there is no statistically significant difference between scoliotic and nonscoliotic girls with menarche when the respective ages at menarche are compared. CONCLUSION: In this study, there was not a statistically significant difference of the age at menarche between scoliotic and nonscoliotic girls. On the other hand, there was a significant difference between menarche positive and menarche negative scoliotic girls in relation to the laterality of scoliotic curves: the former showed predominantly right sided primary curves while the latter had mainly left sided primary curves.

Adolescent↗
PubMedDate not supplied

Seasonal rhythms of menarche in the United States: correlates to menarcheal age, birth age, and birth month.

PURPOSE: To examine the seasonality of menarche in a large sample of women from the United States. METHODS: Retrospective data were collected on month of birth and menarche, age of menarche, and latitude and altitude of residence from a sample of approximately 3,000 U.S. women from the TREMIN Research Program and from a college student population. RESULTS: Monthly analyses using observed (O) to expected (E) ratios indicated a peak frequency of menarche in July (1.45) and January (1.19) and troughs in February (0.75) and May (0.79). Collapsing the data into seasons also revealed summer and winter peaks. Participants from a younger cohort (born after 1970) had an earlier age of menarche than participants from an older cohort (born before 1970). Older cohort participants also had a more pronounced December-January frequency peak and younger cohort participants had a more pronounced July frequency peak. Older cohort participants exhibited more variability in menarcheal age as a function of menarche month and birth month. Late-maturing participants (>14 years) had a larger December peak of menarche frequencies. Spring-born participants exhibited less seasonality to their menarche. Month of birth was not significantly associated with month of menarche; however, fewer cases than expected occurred 3 months after the birth month and more cases than expected occurred 6 months after the birth month. Age of menarche and monthly distribution of menarche did not vary according to latitude or altitude. CONCLUSIONS: Menarche seasonality is suggested to be a multifactor process mediated by the most prominent seasonal time cue. Attention to these cues that have been hypothesized to contribute to menarche seasonality (e.g., stress or the photoperiod) may have practical implications for women's health, given some of the risks associated with early menarche.

Adolescent↗
PubMed2001

A comparison of menstrual changes expected by pre-menarcheal adolescents and changes actually experienced by post-menarcheal adolescents in Mexico.

This survey explored para-menstrual changes that Mexican pre-menarcheal girls expect to experience and paramenstrual changes actually experienced by post-menarcheal girls. The survey included 95 pre-menarcheal girls who reported what they expected to experience in the para-menstruum, and their answers were compared with para-menstrual changes reported by 98 post-menarcheal girls. There were more post-menarcheal than pre-menarcheal girls who reported negative physical changes, while more pre-menarcheal girls expected to experience negative changes related to cognitive-emotional expressions. Regarding positive para-menstrual changes, despite the fact that hardly any of the girls named them, more post-menarcheal girls reported positive changes than pre-menarcheal girls who expected the changes. The dominant menstrual discourse concerning menstruation focused on para-menstrual negative changes, which can lead pre-menarcheal girls to anticipate their periods with fear and to overlook positive changes that may occur in the para-menstruum.

Adolescent↗
PubMed2000

Height and weight change across menarche of schoolgirls with early menarche.

OBJECTIVE: To describe growth before and after menarche. DESIGN: Nine hundred five fourth grade school girls were identified as a closed cohort from the first semester of 1993 for the observational study of the onset of menarche and its predictive factors. SETTINGS: Eight elementary schools in Taipei City and Taipei County, Taiwan. MAIN OUTCOME MEASURES: Data were collected from self-administered questionnaires and school records. Height and weight were measured in September, January, February, and June, or only in September and February of each year. RESULTS: All subjects remained in the cohort until sixth grade, 410 of whom had their first menstruation before graduating from elementary school. Height, weight, and body mass index (calculated as weight in kilograms divided by the square of height in meters) at each time point were plotted against 2 time scales: chronological age and time from the onset of menarche. Growth velocity of height and weight across the onset of menarche was assessed with slope change using the mixed-effect model analysis. CONCLUSIONS: The results support the hypothesis that height velocity reaches a peak 1 year before menarche but height velocity stopped increasing within 1 year after menarche. The change in weight velocity reveals no obvious growth spurt at age of menarcheal onset.

Age Factors↗
PubMed1993

Menarche and sleep among Japanese schoolgirls: an epidemiological approach to onset of menarche.

Menarche occurs in the pubertal period of normal girls without endocrine disorders; nevertheless, the mechanism of its onset remains unclear. A cross-sectional study was conducted in 254 schoolgirls aged 9 to 15 years to clarify the effects of age, body weight, height, hours of sleep, and sleep conditions on the onset of menarche. Among six schoolyear groups comprising about 42 girls for each, the menarcheal percent, body weight, and height significantly increased according to the school year; by contrast, hours of sleep shortened significantly. The maximal increase in the menarcheal percent followed the abrupt decrease in hours of sleep. The result of multiple logistic regression analysis indicated that body weight, height, and hours of sleep were significantly related to the presence/absence of manarche while controlling for the effects of age and sleep conditions. These data suggest that the onset of menarche is affected by hours of sleep, as well as body weight and height reported in the previous studies.

Adolescent↗
PubMed1999

[Age at menarche and the investigation of selected biophysical parameters in the course of menarche].

DESIGN: The aim of our study was a currently clinical analysis of menarche. MATERIALS AND METHODS: The mean age of menarche was investigated in 4497 girls between 1975-1997 69 girls were examined throughly in the course of menarche. Age at menarche, body weight, height, body mass index (BMI), some of the hormones and ultrasonography of sexual organs were investigated. RESULTS: We demonstrated that mean age of menarche was 13.1 year, height 159.2 cm, weight 48 kg, body mass index (BMI) 18.9. Mean size a mucous membrane was 5.7 mm. Ratio of uterus to cervix indicated dominance of the uterus. Mean levels of hormones were: E2--89.4 pg/ml, FSH--6.2 UI/ml, LH--5.7 UI/ml. Relation LH to FSH was nearly 1.

Adolescent↗
PubMed1993

[Age at menarche among schoolgirls in Odense. Is age at menarche still decreasing in Denmark?].

The average age at the menarche has decreased from the 1850s to the 1950s. It is controversial whether there has been a continued decrease since the 1950s. The object of this investigation is to illustrate whether this trend has continued into the 1980s. This study is based on the ages at the menarche as recalled by 908 girls aged 14-16 years in 40 schools in Odense. The information was obtained during intervals of differing lengths and consequently, the parameters of the distribution of the age at the menarche were estimated in a randomly grouped normal distribution. The average age at the menarche was found to be the same throughout the municipality (13.27 years; 95% confidence limit 13.20-13.35). The variations were found to be significantly differentiated by the type of school district. The variations were low in the suburbs and in the surrounding rural districts, higher in the inner city areas and highest among girls attending private schools. Compared with the results from other recent Danish studies, these findings suggest a halt in the decline of the average age at the menarche, which may be temporary.

Adolescent↗
PubMedDate not supplied

Menarcheal age and growth pattern of Indian girls adopted in Sweden. I. Menarcheal age.

The median menarcheal age of 107 girls adopted from India by families in Sweden was 11.6 years, which was significantly lower than in Swedish and most Indian studies. Five girls had menarche before the age of 9 years, the earliest at 7.3 years. Those who arrived at a later age had earlier menarche. No differences in menarcheal age were found with respect to geographic origin. The reasons for the earlier pubertal maturation are not clear. Factors associated with the rapid transition from an underprivileged to a privileged environment are probably involved, besides genetic determinants. The serious medical, social and emotional consequences of very early pubertal development necessitate further clarification of the underlying mechanisms.

Adolescent↗
PubMed1986

[Comparison of the levels of serum ferritin and other hematologic parameters in males and pre-menarche and post-menarche females].

Our study group consisted of 43 healthy preadolescence and adolescence of which 17 were boys and 13 premenarcheal and 13 postmenarcheal girls. Haematocrit, haemoglobin, serum iron, transferrin saturation, total iron-binding capacity, latent iron-binding capacity and serum ferritin were analyzed. Authors found that post-menarcheal girls are at lower levels than boys and that menstrual blood loss is a significant factor in determining iron status.

Adolescent↗