Intergenerational Transmission of Reproductive Behavior during the Demographic Transition Is fertility between parents and their children positively correlated? Although the arst study of intergenerational fertility was conducted more than a century ago, the number of studies remains few. Most investigators report a positive correlation between the fertility of mothers and that of their daughte...

Bjorklund and Kipp (1996) provide an evolutionary framework predicting that there is a female advantage in inhibition and self-regulation due to differing selection pressures placed on males and females. The majority of the present review will summarize sex differences in self-regulation at the behavioral level. The neural and hormonal underpinnings of this potential sexual dimorphism will also...

Darwin expressed alternative theoretical perspectives on a range of issues fundamental to our understanding of evolution, thereby making it possible for his intellectual descendants to develop his ideas in markedly different and even incompatible directions while still promoting their views as authentically “Darwinian.” The long-running and well-publicized scientific rivalry between Richard Daw...

As a major agent of rapid speciation, interspecific hybridization has played an important role in plant evolution. When hybridization involves species that exhibit self-incompatibility (SI), this prezygotic barrier to self-fertilization must be overcome or lost to allow selfing. How SI, a normally dominant trait, is lost in nascent hybrids is not known, however. Here we demonstrate that hybrid ...

Previous studies have shown that the experience of infertility is linked with psychological responses such as depression, anxiety, guilt, social isolation, and decreased self-esteem in both men and women. The prevalence of depression among infertile women ranges from 8% to 54%. Treating gynecologists and healthcare professionals seldom recognized the psychosocial distress in women undergoing fe...

The author examines the demographic characteristics of the self-declared black population in Brazil. "A...general conclusion is that there are three demographic profiles: that of Whites, of Blacks, and of mixed blood.... The analysis has shown that [blacks and mixed bloods] are subjected to changes in mortality, marriage, and fertility, though at differing times. Mixed bloods are increasingly c...

BACKGROUND Mexican-American fertility is poorly understood because data limitations prevent researchers from accurately estimating the fertility levels of members of this group and from determining how their fertility changes within and across generations. OBJECTIVE Using binational data and an innovative methodological addressing key methodological limitations, I (1) estimate the fertility of ...