Materials and Methods In this analysis we used three sources of data on infertility: the 1965
National Fertility Study and the 1973 and 1976 National Surveys of Family Growth. Because …

Few countries collect information relevant to the study of the epidemiology of infertility.
National data available in the UK are either indirect or incomplete. Furthermore, most …

" 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 …

Factors Affecting Fertility: Part XXXIII 283 families. The other situation was the existing status
of research in differential fertility. Previous studies of data of the census type had indicated …

This study on the epidemiology of human fertility emphasizes the study and analysis of
several parameters. These include:(a) the measure and distribution of fertility. The incidence …

Few tools exist in reproductive epidemiology for studying adverse effects on fertility. Data on
time to pregnancy (the number of menstrual cycles required to conceive) can be used to …

The research available concerning the phenomenon of childlessness is very limited,
especially when compared with the voluminous literature which has been directed toward …

Few goals are universally shared, but among them are the wish for good health and long
life. For the past two decades we have lived in the midst of a revolution that has moved two …

The preliminary studies and plans for the present work were commenced during my service
under Dr. Poul Kiihnel, Chief Physician, in the Department of Gynecology and Obstetrics, the …

Problems of emotional adjustment and marital difficulties experienced by a large sample of
patients (843 couples) attending an infertility clinic between 1975 and 1985 were …