نتایج جستجو برای: menarche

تعداد نتایج: 3056  

Fariba Moradi, Masoomeh Kazemian Mohammad Hozoori, Shahram Arsang-jang Zoha Hosseini-zade,

Background Menarche is a substantial and important period in the health of adolescent girls’, and has a significant impact on their health in the upcoming years. Accordingly, in this study, we aimed to not only determine the average age of menarche among high school girls in Qom city, but also to examine the effect of some factors on onset age of menarche. Materials and Methods In this cross-se...

2010
Bahareh Schweiger Georgeanna J. Klingensmith Janet K. Snell-Bergeon

OBJECTIVE We sought to examine whether age at menarche has changed over the past 4 decades by comparing age at menarche by year of diagnosis with type 1 diabetes. RESEARCH DESIGN AND METHODS This work consisted of a cross-sectional study of age at menarche in two cohorts: adolescents (ages 11-24 years, n = 228) and adults (ages 19-55 years, n = 290, enrolled in the Coronary Artery Calcificati...

2006
ROGER REVELLE

Frisch, R. E., and Revelle, R. (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 menarch...

Journal: :European journal of endocrinology 2009
A M Bau A Ernert L Schenk S Wiegand P Martus A Grüters H Krude

OBJECTIVE More than 30 years ago Frisch and Revelle proposed a body weight threshold for the onset of menarche. Based on this hypothesis, a further acceleration of age at menarche can be expected in times of childhood obesity. DESIGN A cross-sectional study of 1840 healthy school girls (Berlin school children's cohort, BSCOC) within the age groups 10-15 years was conducted in 2006-2007. MET...

Journal: :Human reproduction 2010
N Xita A Chatzikyriakidou I Stavrou Ch Zois I Georgiou A Tsatsoulis

BACKGROUND Twin studies have shown that age at menarche may be subject to hereditary influences but the specific determinants are unknown. Estrogens are known to have an important role in menarche. Since the enzyme aromatase is responsible for the conversion of androgens to estrogens, the aromatase (CYP19) gene could be a candidate gene for the regulation of menarche. The aim of this study was ...

Journal: :Archives of disease in childhood 1971
R E Frisch R Revelle

Frisch, R. E., and Revelle, R. (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 menarch...

Journal: :medical journal of islamic republic of iran 0
z yusofi from the department of gynecology, qaem medical center; mashhad university of medical sciences, mashhad, i. r. iran. n rajaie

the present study was initiated to derive an indirect method for estimating body fat mass (bfm) and to evaluate the correlation between indirect anthropometric techniques for this estimation and to examine the relation of these parameters and of iq to age of menarche. a total of 578 adolescent girls of ten junior high schools in five educational districts of mashhad, participated in a cross sec...

2015
Yi Song Jun Ma Anette Agardh Patrick W.C. Lau Peijin Hu Bing Zhang

BACKGROUND Declining age at menarche has been observed in many countries. In China, a decrease of 4.5 months per decade in the average age at menarche among the majority Han girls has recently been reported. However, the trends in age at menarche among ethnic minority girls over the past 25 years remain unknown. OBJECTIVES To compare the differences in median age at menarche among girls aged ...

2013
Sudhansu Sekhar Nishank

BACKGROUND AND OBJECTIVE Females with sickle cell disease (SCD) often show late onset of menarche. In transgenic sickle cell mouse, deficiency of gene encoding endothelial nitric oxide synthase (eNOS) has been reported to be associated with late onset of menarche. Thus to explore the possible association of eNOS gene polymorphism with age of onset of menarche in SCD females, 3 important eNOS ge...

2014
Yanyu Lyu Lucia Mirea Junmin Yang Ruth Warre Jun Zhang Shoo K Lee Zhu Li

BACKGROUND Improvements in socioeconomic conditions and population health have been linked to declining age at menarche. In China, secular trends in age at menarche following extensive economic reform during recent decades have not been thoroughly investigated. This study examined the overall trend in age at menarche and assessed differences in the rate of change of age at menarche over time, a...

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