The objective was to analyze the relationship between socioeconomic status and age at menarche among indigenous and non-indigenous girls in the Araucanía Region of Chile, controlling for nutritional status and mother's age at menarche. A total of 8,624 randomly selected girls from 168 schools were screened, resulting in the selection of 207 indigenous and 200 non-indigenous girls who had recent...

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 cros...

Early onset of menarche has been shown to be associated with breast cancer and ischaemic heart disease. Studies on age at menarche of the Malaysian population are poorly documented. This study aimed to determine the influence of anthropometric and socio-demographic factors on the age at menarche of university students in Malaysia. Data were obtained in 2010-11 from 961 students between the ages...

BACKGROUND Age at sexual debut is a key behavioural indicator used in HIV behavioural surveillance. Early age at menarche may precipitate early sex through perceived readiness for sex, or through school drop-out, but this is rarely studied. We investigated trends and circumstances of sexual debut in relation to schooling and age at menarche. METHODS AND FINDINGS A cross-sectional sexual behav...

OBJECTIVE To estimate the mean age at menarche and its association with nutritional status in Brazilian adolescents. METHODS The study sample included female adolescents aged 12-17 who participated in a multicenter, school-based, country-wide, cross-sectional study entitled The Study of Cardiovascular Risk in Adolescents (Estudo de Riscos Cardiovasculares em Adolescentes [ERICA]). Mean and me...

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 cros...

The term menarche signifying the onset of menstruation is merely one manifestation of puberty. The age at menarche has been getting earlier all over the world with varying rates. An average decline of about 4 months per decade has been reported from the United States and in Western Europe over the period 1830-1960, while that in Eastern Europe since the late nineteenth century. There have been ...

Age at menarche has been associated with several reproductive conditions, and frequencies differ by race. Racial disparities also impact fibroid risk. We comprehensively examined the relationship between age at menarche, fibroid characteristics, and race. Women were enrolled in Right From the Start (2001-2010), a multistate study that systematically screened for fibroids during very early pregn...

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...