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At least 1,009 records · Page 56Linked to original sources
PubMed1993

The demography of infertility in the United States.

"Some popular descriptions of infertility have suggested that there are nine or ten million infertile couples, that one in six couples is infertile, that infertility is increasing rapidly, or that there is an 'epidemic' of infertility in the USA.... The purpose of this chapter is to determine whether these perceptions are accurate and if not, to suggest why there is a perception that infertility is epidemic.... We report two measures of infertility here. The first is called 'impaired fecundity' and is derived from a series of direct survey questions...on the ability to have children. The second is 'infertility status' among married couples." Data are from the National Survey of Family Growth for 1976, 1982, and 1988. Data for 1965 are from the National Fertility Study.

Americas↗
PubMed1995

[Demography perspectives and forecasts of the demand for electricity].

"Demographic perspectives form an integral part in the development of electric load forecasts. These forecasts in turn are used to justify the addition and repair of generating facilities that will supply power in the coming decades. The goal of this article is to present how demographic perspectives are incorporated into the electric load forecasting in Quebec. The first part presents the methods, hypotheses and results of population and household projections used by Hydro-Quebec in updating its latest development plan. The second section demonstrates applications of such demographic projections for forecasting the electric load, with a focus on the residential sector." (SUMMARY IN ENG AND SPA)

Americas↗
PubMed2002

[Genetic demography of Ukrainian urban populations in the 1990's: ethnicity and birth places of migrants to the Poltava population].

Analysis of the birthplace and ethnicity of males and females contracting marriages in the city of Poltava in 1960, 1985, and 1995 revealed a trend towards return of Ukrainians from various regions of the former Soviet Union to their places of origin. In the migration flow, Russians were gradually substituted by Ukrainians, and the total proportion of Slavs increased. The isolation by distance (b) decreased from 0.00122 to 0.00075 in the period from 1960 to 1985 and then increased to 0.00098 by 1995. Positive association was found between the parent-offspring distance and marriage distance (the correlation coefficient r = 0.65-0.75).

Adult↗