نتایج جستجو برای: reproductive age
تعداد نتایج: 835215 فیلتر نتایج به سال:
19 1. How much should an individual invest in reproduction as it grows older? Answering 20 this question involves determining whether individuals measure their age as the time 21 left for future reproduction or as the rate of deterioration in their state. Theory 22 suggests that in the former case individuals should increase their allocation of 23 resources to reproduction as opportunities for ...
BACKGROUND A fundamental life history question is how individuals should allocate resources to reproduction optimally over time (reproductive allocation). The reproductive restraint hypothesis predicts that reproductive effort (RE; the allocation of resources to current reproduction) should peak at prime-age, whilst the terminal investment hypothesis predicts that individuals should continue to...
Background: Human Papilloma viruses (HPV) is the most common sexually transmitted infection (STI) and the most important pathogenic factor for cervical intraepithelial lesions and carcinoma therefore a significant source of morbidity and mortality worldwide. This study was designed to investigate reproductive and medical factors associated with HPV infection in women referred to Colposcopy clin...
objective: to study knowledge about reproductive health among female adolescents and to assess their treatment seeking behavior regarding reproductive health problems in an urban slum of mumbai. materials and methods: cross sectional descriptive study was undertaken in an urban slum area of mumbai for period of 3 months. all adolescent girls from 10 - 19 years of age, who had attained menarche,...
Serum concentrations of p, p′-DDE, HCB, PCBs and reproductive hormones among men of reproductive age
OBJECTIVE The purpose of this study was to describe the patterns of prescription medication borrowing and sharing among adults, particularly women of reproductive age. METHODS Data were collected from the 2001-2006 HealthStyles surveys, an annual mail survey conducted in the United States concerning trends in health behavior. The total responses received were 26,566 of 36,420 surveys mailed (...
Age-related improvements in reproductive performance have been explained by the selection, constraint, and restraint hypotheses (increased performance related to greater effort and a declining residual reproductive value). Using a laboratory population of the burying beetle, Nicrophorus orbicollis, 6 measures of performance were assessed. Consideration of the selection and constraint hypotheses...
Background Adiposity is increasing rapidly in China but little is known about the relevance to it of women's reproductive factors, which differ inter-generationally and from that in the West. We assess associations of adiposity with life-course reproductive factors in Chinese women. Methods In 2004-08, the nationwide China Kadoorie Biobank recruited 303 000 women aged 30-79 (mean 50) years fr...
Lifetime reproductive success and timing of reproduction are key components of life-history evolution. To understand the evolution of reproductive schedules, it is important to use a measure of fitness that is sensitive both to reproductive quantity and reproductive timing. There is a contradiction between the theory, which mainly focuses on the rate measures of fitness (r and lambda), and empi...
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