Background Reduced age at menarche is an important health indicator for women and may be associated with complications such as an increased risk of asthma, breast cancer, ovarian cancer, type 2 diabetes. We aimed to examine the factors related to the age at menarche in Iran. Materials and Methods: In this systematic review and meta...

BACKGROUND Late menarche, early menopause, high parity, and early first birth decrease the risk of development of breast cancer. The influence of these factors on the survival of breast cancer patients has not been explained. METHODS A group of 1885 patients with operable breast cancer was studied retrospectively. A univariate analysis was used to calculate 10-year overall survival (OS) and d...

OBJECTIVE To assess secular trends in menarcheal age between 1973 and 1994 and to determine whether childhood levels of height, weight, and skinfold thicknesses can account for racial (white/black) differences in menarcheal age. METHODS Data from 7 cross-sectional examinations of school-aged children, with menarcheal age obtained through interviews, were used for both cross-sectional (11 218 ...

PURPOSE Westernized eating habits have been associated with early-age menstruation, which increases the incidence of dysmenorrhea and premenstrual syndrome among adolescent girls. We therefore surveyed changes in menarche timing and the general menstrual characteristics of adolescent girls in Seoul, Korea. METHODS We surveyed 538 teenage girls who visited our hospital between July and Novembe...

OBJECTIVE This study examines the relationship of intrauterine growth, measured by size and maturity at birth, to age at menarche, while also considering a wide range of other factors that may affect maturation. The research is motivated by the current debate about the importance of the prenatal environment as a determinant of later disease risk. METHODS Data were collected during the Cebu Lo...

BACKGROUND An estimated 11% of births occur preterm, and survival is improving. Early studies suggested an association between preterm birth and earlier puberty. Given the adverse outcomes associated with early puberty this could have significant public health implications. The objective of this review was to assess the timing of puberty after preterm birth. METHODS Pubmed, Embase, Popline, G...

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 ...

BACKGROUND Age at menarche is known to be regulated by genetic and environmental factors. To date, no menarcheal data are available on North Korean women. In this cross-sectional survey, we investigated age at menarche and its possible influencing factors in North Korean refugees. METHODS Four hundred and eleven North Korean refugees were surveyed at a North Korean female refugee camp using a...

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 purpose of this study was to investigate the secular trend of menarche age within the last 35 years in an immigrant urban city in Turkey-İzmir. We found the mean age at menarche as 13.10±1.18 years for 121,257 women. The reported mean age at menarche showed a decreasing trend over time. For women born before 1963 (≥40 years of age), the mean age at menarche was 13.08±1.21 years. For women b...