Parental age at childbirth and age of menarche in the offspring

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No association between age at menarche and sex of offspring.

Sir, We read with interest the article by Fukuda et al. (2011). The title ‘The sex ratio of offspring is associated with the mothers’ age at menarche’ suggests a direct connection between age at menarche and sex of offspring. We consider this interpretation a stretch of the presented data and want to comment on some issues in their study. Additionally, results from our substantially larger Dani...

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Factors Related to the Age at Menarche in Iran: A Systematic Review and Meta-Analysis

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...

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The Association Between Menarche Age and First Offspring Sex Ratio

Background: Offspring sex ratio (OSR) serves as an important social factor, and various other factors are hypothesized to be associated with it, such as maternal diet, time of ovulation and insemination, environmental phenomena, parental age, and infertility treatment. Objectives: This research was performed to assess the association between mothers’ menarche age, first pregnancy age, and sex r...

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Age at Menarche and its Relationship to Anthropometric Indices in Adolescent Girls

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...

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Age at Menarche and its Related Factors among School Girls, in Zanjan, Iran

BackgroundThere are differences in the age at menarche in different countries and it seems that in recent decades gradually the age of puberty is declining. The aim of the present study was to determine the age at menarche and its related factors in school girls in Zanjan city, Iran.Materials and MethodsThis cross-sectional study was conducted on 1,500 healthy school girls between 6-17 years ol...

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ژورنال

عنوان ژورنال: Human Reproduction

سال: 2010

ISSN: 0268-1161,1460-2350

DOI: 10.1093/humrep/dep473