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  • early
  • There was a weaker association between physical abuse and early menarche. (psychcentral.com)
  • Wise noted that "A link between sexual abuse and early menarche, if real, could have important public health implications because early menarche is associated with earlier age at initiation of sexual activity and first pregnancy, and is a risk factor for several adult conditions, including gynecologic disorders, cardiovascular disease, and cancer . (psychcentral.com)
  • Objective: Early menarche is a risk factor for breast cancer. (rti.org)
  • 001). Girls living in urban areas, living in central areas, with high BMI, and with high-energy diets had a high risk of early menarche, whereas girls living on the east coast who had high-carbohydrate diets had a low risk of early menarche. (aappublications.org)
  • Earlier ages at menarche were associated with higher rates of both depressive symptoms and antisocial behaviors in early-middle adulthood. (mdedge.com)
  • Early Menarche: A Review of Research on Trends in Timing, Racial Differences, Etiology and Psychosocial Consequences. (ebscohost.com)
  • No consistent association was found between maternal age at menarche and asthma, eczema, hay fever or atopy in their children during early childhood. (bmj.com)
  • 7, 8 Xu et al have demonstrated in a Finnish birth cohort that early age of maternal menarche, a surrogate marker for persistently raised levels of oestrogen, was associated with a higher prevalence of atopy among their offspring at the age of 31 years. (bmj.com)
  • 1989
  • With the exclusion of the surveys in 1989 and 2015 (because the data of 1989 on menarche were not contained and the data of 2015 were not yet available), 3483 girls aged 6 to 18 years were included. (aappublications.org)
  • childhood sexua
  • According to lead author Lauren A. Wise, ScD, an epidemiologist at the Slone Epidemiology Center and an assistant professor of epidemiology at Boston University School of Public Health, it is biologically plausible that childhood sexual abuse could influence age of menarche. (psychcentral.com)
  • socioeconomic
  • The objectives of this study were to evaluate trends in the average age at menarche in China and to explore the demographic, socioeconomic, nutritional, and lifestyle characteristics associated with age at menarche in a large sample of Chinese girls born over the past 3 decades. (aappublications.org)
  • The age at menarche of girls from middle class families was significantly lower than those of girls from the low socioeconomic class and is similar to those obtained for U.S. girls The age of menarche of girls from low income families is lower than a result of similar study obtained for rural India. (cogprints.org)
  • The influence of socioeconomic and nutritional status on menarche in Nigerian school girls Nutr-Health 1997;11(3):185-95. (cogprints.org)
  • median
  • A study of girls in Istanbul, Turkey, found the median age at menarche to be 12.74 years. (wikipedia.org)
  • The estimated mean and median of age at menarche was 12.72 years (standard deviation = 1.05) and 12.67 years, respectively. (ebscohost.com)
  • risk
  • This study demonstrates a statistically significant impact of age at menarche on DFOR risk later in life among infertile women. (nih.gov)
  • HealthDay News - Earlier age at menarche is associated with increased risk of gestational diabetes mellitus (GDM), according to a study published online January 26 in Diabetes Care . (empr.com)
  • In a prospective cohort study, Liwei Chen, MD, PhD, from Clemson University in South Carolina, and colleagues examined the correlation between age at menarche and risk of GDM. (empr.com)
  • In summary, earlier age at menarche was associated with an elevated risk of GDM," the authors write. (empr.com)
  • While the researchers found increased risk for exposure at menarche and first birth for premenopausal and postmenopausal participants, respectively, who were lifetime nonsmokers, there was no association of traffic emissions with breast cancer for the other time periods. (buffalo.edu)
  • intake
  • Among all variables, urban residency, BMI, and energy intake are negatively associated with age at menarche, whereas carbohydrate intake is positively associated with age at menarche. (aappublications.org)
  • years
  • Since nutrition and the standard of living have improved in the last 200 years, one explanation is that the time for menarche has always been the same biologically, but was delayed because of the lack of essential nutrients for the chemical pathways to trigger hormone synthesis. (encyclopedia.com)
  • Previous studies have found that the average age at menarche has decreased from ∼16 to 13 years over the past 180 years, with some variation across different countries. (aappublications.org)
  • The average age of menarche is about 12.5 years in the United States, 12.72 in Canada, and 12.9 in the UK. (wikipedia.org)
  • The mean age at menarche for girls from middle class families was 12.22 ± 1.19 years while that for girls from low income families was 13.01 ± 1.44 years. (cogprints.org)
  • Most of the children from the middle class families attained menarche at the ages of 12 and 13 while those from the low income families attained menarche at the ages of 12, 13 and 14 years. (cogprints.org)
  • The mean AOM was 12.5 years for the approximately 90% of the participants who had reached menarche. (thesoyfoodscouncil.com)
  • A woman's life-phase from menarche (generally reached on average at 14 years, at about 12 years for elite women) to the birth of her first child was unusually long, averaging ten years. (wikipedia.org)
  • The first period usually begins between twelve and fifteen years of age, a point in time known as menarche. (wikipedia.org)
  • The average age of menarche is approximately 12.5 years in the United States, 12.7 in Canada, 12.9 in the UK and 13.1 years in Iceland. (wikipedia.org)
  • occurrence
  • The occurrence of menarche may relate to follicular pool size and/or speed of follicle recruitment, which in turn is predictive of occurrence of DFOR later in life. (nih.gov)
  • The main outcome was age at menarche assessed as the month and year of the occurrence of the first menstrual cycle. (ebscohost.com)
  • pregnant
  • Although unlikely, it is possible for a girl who has engaged in sexual intercourse shortly before her menarche to conceive and become pregnant, which would delay her menarche until after the end of the pregnancy. (wikipedia.org)
  • This goes against the widely held assumption that a woman cannot become pregnant until after menarche. (wikipedia.org)
  • adult
  • Menarche is an abrupt signal that marks a change in social status from child to adult. (encyclopedia.com)
  • Cross-culturally, menarche has a variety of meanings that include adult responsibilities, freedoms, and expectations regarding reproduction. (encyclopedia.com)
  • 18. Shama K, Talwar I. and Sharma N Age at menarche in relation to adult body size and physique Ann Hum Biol 1988;15(6):431-434. (cogprints.org)
  • occurs
  • When menarche occurs, it confirms that the girl has had a gradual estrogen-induced growth of the uterus, especially the endometrium, and that the "outflow tract" from the uterus, through the cervix to the vagina, is open. (wikipedia.org)
  • Certain systemic or chronic illness can delay menarche, such as undiagnosed and untreated celiac disease (which often occurs without gastrointestinal symptoms), asthma, diabetes mellitus type 1, cystic fibrosis and inflammatory diseases, among others. (wikipedia.org)