This study intended to identify familial risk factors which differentiate sexually abused young girls from nonabused girls and, further, young victims of intrafamilial from those of extrafamilial sexual abuse. The subjects were 112 girls aged three to five years and their families. Forty-two were the victims of intrafamilial sexual abuse and 28 were victims of extrafamilial sexual abuse while 4...

A theory for the evolution of behavioral interactions among relatives is developed that allows for genetic correlations between the types of behavior that are expressed in different social contexts. Both theoretical and empirical considerations indicate that such genetic constraints will almost certainly be common in natural populations. It is shown that when genetic correlations between elemen...

The use of adult intrafamilial gamete donors and gestational surrogates is generally ethically acceptable when all participants are fully informed and counseled, but consanguineous arrangements or ones that simulate incestuous unions should be prohibited. Adult child-to-parent arrangements require caution in order to avoid coercion, and parent-to-adult child arrangements are acceptable in limit...

Using the hypertriglyceridemic recall group of the Princeton School Family Study, we assessed the effectiveness and ramifications of family sampling based on hypertriglyceridemic probands and examined whether within-family correlations of lipids and lipoproteins outlast the period of shared common household environments. Thirty-two pediatric and 35 adult probands (who had fasting plasma triglyc...

Three sibs with Cohen syndrome are presented. Abnormalities present in all three children include mental retardation, hypotonia, and short philtrum with open mouth and prominent lips. The older two sibs have a similar facies and an engaging personality. The youngest child shows a different facial appearance and marked behavioural problems, thereby illustrating the intrafamilial variability whic...