It has been demonstrated for many pre-industrial populations that the age at marriage, or marriage duration, influences age-specific marital fertility but the reason for this remains unclear. Among the several mechanisms that may be responsible, the following are often cited: secondary sterility or increased subfecundity associated with parity; declining coital frequency; the age difference bet...

Family formation changed dramatically over the twentieth century in the United States. The impact of these changes on childbearing has primarily been studied in terms of nonmarital fertility. However, changes in family formation behavior also have implications for fertility within marriage. We use data from ten fertility surveys to describe changes in the timing of marital childbearing from the...

The Full Birth History has become the dominant source of estimates of fertility levels and trends for countries lacking complete birth registration. An alternative, the 'Own Children' method, derives fertility estimates from household age distributions, but is now rarely used, partly because of concerns about its accuracy. We compared the estimates from these two procedures by applying them to ...

From the mid-1960s to the mid-1970s, when fertility was declining in Thailand as a whole, especially rapid declines occurred in Northern Thailand, but they did not occur uniformly in all the region's provinces. The Northern Thailand Fertility Study, initiated in 1975 to study the reported fertility changes, gathered data in two provinces: Chiang Mai, where fertility decline has been quite rapid...

Fertility is a very old concept and many definitions are available in literature. The first edition of the Dictionnaire de l’Académie Française in 1694 defines fertility as: “quality of that which is fertile; good farming is that which contributes most to the fertility of the soil” (the capacity of a soil to produce a large harvest). A more accurate definition appeared in the 18th century in th...

BACKGROUND Despite a large body of data suggesting that delivery of fertility care to cancer patients is inconsistent and frequently insufficient, there is a paucity of literature examining training in fertility preservation for those physicians expected to discuss options or execute therapy. The study objective was to compare fertility preservation training between Reproductive Endocrinology &...

This is an endeavor to study the plausible causal socio-cultural variable and biological pathways influencing human fertility among the remotely located primitive tribal community of Orissa. The present paper deals with the fertility of 156 Mankirdia women. Efforts are made to study the biological determinants and societal factors affecting fertility. The observation of fertility gives an impre...

A fundamental switch in the fertility—development relationship has occurred so that among highly developed countries, further socioeconomic development may reverse the declining fertility trend. Here we shed light on the mechanisms underlying this reversal by analyzing the links between development and age and cohort patterns of fertility, as well as the role of gender equality. Using data from...

In settings of high fertility and high HIV prevalence, individuals are making fertility decisions while simultaneously trying to avoid or manage HIV. We sought to increase our understanding of how individuals dually manage HIV risk while attempting to achieve their fertility goals as part of the project entitled HIV Status and Achieving Fertility Desires conducted in Zambia in 2011. Using multi...

Scent communication plays a central role in the mating behavior of many nonhuman mammals but has often been overlooked in the study of human mating. However, a growing body of evidence suggests that men may perceive women's high-fertility body scents (collected near ovulation) as more attractive than their low-fertility body scents. The present study provides a methodologically rigorous replica...