منابع مشابه
Male Fertility Factors
Since the early 60s, in our lab we sought useful correlations of seminal traits and fertility in order to ultimately predict the reproductive outcome of bovine semen used in artificial breeding or the fertility of a specific male under natural service. Despite these efforts, to this day we can only account for approximately 50-60% of the variation in fertility among males by measuring seminal t...
متن کاملeffect of path analysis factors on total fertility rate in iran in 2000
total fertility rate relates to the number of children that a woman bears in the fertility period of her life. fertility function is one of the most important health and population indicators. this indicator affects social, health, economic and cultural factors. this study is an ecological or correlative one. factors affecting total fertility rate in iran in the year 2000 are studied in this pa...
متن کاملNutritional factors and immunological ageing.
Undernutrition profoundly affects immune responses, particularly at the extremities of life: in infants and in the elderly. The present review focuses on this interrelationship in the elderly. It describes three different stages of ageing: stage 1, healthy ageing, which is observed in very healthy elderly individuals who have no nutritional deficit; stage 2, common ageing, which is observed in ...
متن کاملthe trend of birth rate and some factors associated with high fertility in west azerbaijan, iran
in order to determine the exact birth rate and also percent of birth - orders in all births in the province of west azerbaijan, all centres of birth registration in the province were asked to fill a questionnaire at the time of issuing identity document for children. in the questionnaire, parents were asked to mention the place of birth, sex and birth order of the children and also the occupati...
متن کاملInfluence of environmental factors on facial ageing.
BACKGROUND A recent twin study has shown that 'looking old for one's age' is associated with increased mortality. Approximately 40% of the variation in perceived age is due to non-genetic factors. OBJECTIVE To examine environmental factors influencing perceived age controlling for diseases. DESIGN A twin study. SETTING In the 2001 wave of the population-based survey--the Longitudinal Stud...
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ژورنال
عنوان ژورنال: Population and Economics
سال: 2020
ISSN: 2658-3798
DOI: 10.3897/popecon.4.e53039