p a twin pregnancy with a complete hydatidiform mole with a coexistent foetus (chmf) is a rare condition that typically results in poor pregnancy outcomes. for patients with refractory vaginal bleeding, termination of pregnancy is more appropriate. however, unified methods for termination remain to be explored. in the present study, we reviewed the termination measures in four cases of twin pre...

Two hundred and fifty-three twin deliveries in Northern Ireland during 1983 were studied. A high perinatal mortality rate of 57 per 1000 births was found, over four times greater than the overall perinatal mortality rate for Northern Ireland in that year. The main cause of these losses remains premature delivery which is frequently complicated by fetal growth retardation. Serial ultrasound scan...

The Georgia Cardiovascular Twin Study is a longitudinal study of biobehavioral antecedents of cardiovascular disease in youth. It includes roughly equal numbers of African Americans and European Americans, with a total of > 500 twin pairs. Focus of the study is the change in relative influence of genetic and environmental factors on development of risk factors for cardiovascular disease. Future...

The Twin Interdisciplinary Neuroticism Study (TWINS) is a three-wave study including >800 twin pairs from the northern part of the Netherlands. The aim of the study is to unravel why neuroticism reflects vulnerability to mental disorders. In this study, we focus on possible mechanisms underlying this vulnerability and their genetic and environmental origins. In total, 125 female twin pairs visi...

in this paper, we investigate various kinds of extensions of twin-good rings. moreover, we prove that every element of an abelian neat ring r is twin-good if and only if r has no factor ring isomorphic to z2  or z3. the main result of [24] states some conditions that any right self-injective ring r is twin-good. we extend this result to any regular baer ring r by proving that every element of a...

BACKGROUND The source of variability in people's response to stressful life events is poorly understood. AIMS We examine the genetic and environmental underpinning of resilience (i.e. the difference between the twins' internalising symptoms and their predicted symptoms based on cumulative stressful life events). METHOD Stressful life event exposure and internalising symptoms were assessed a...

The study of twin subjects permits the documentation of crude heritability and may promote the identification of specific causal alleles. We believe that at the current time, the chief research advantage of twins as subjects, especially monozygotic twins, is that the commonality of their genetic and cultural identity simplifies the interpretation of biological associations. In order to study ge...