Results 111 to 120 of about 59,149 (243)
The Fertility Pattern of Twins and the General Population Compared: Evidence from Danish Cohorts 1945-64 [PDF]
Twin studies provide an important possibility for demographers to analyze patterns of heritability and to estimate structural models with controls for endowments. These possibilities are increasingly used in the context of fertility and related behaviors.
Axel Skytthe +3 more
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EpigenomesBackground/Objectives: Human identical twins are born at a rate of 3–4 per 1000 live births. Many other mammals also occasionally produce monozygotic twins, referred to as sporadic polyembryony. The underlying mechanisms are unknown.
Jenny van Dongen +2 more
doaj +1 more source
Class - III malocclusion: Genetics or environment? A twins study
Journal of Indian Society of Pedodontics and Preventive Dentistry, 2005 Etiology of class-III malocclusion is generally believed to be genetic. A wide range of environmental factors have been suggested as contributing factors for the development of class-III malocclusion.
Jena A, Duggal R, Mathur V, Parkash H
doaj
Sickness Absence and the Effects of Having a Spouse - Can twins reveal the selection effect? [PDF]
Individuals that are married are often found to be healthier than singles. A crucial issue is to distinguish if this is due to a selection effect or due to a true protective effect of partnership. The purpose of this study is to distinguish these effects
Nilsson, william
core +1 more source
A synchronized unique presentation of inguinal hernia in infantile twins
Egyptian Pediatric Association GazetteBackground Female structures such as the ovaries, fallopian tubes, ligaments, and uterus are rarely encountered inside a hernial sac. The prevalence of groin hernias containing parts of female genitalia remains unknown. Occurrence in monozygotic twins is
Srikanth Thiyagarajan +2 more
doaj +1 more source
Monozygotic Twinning in Mice [PDF]
Journal of Medical Genetics, 1965 Wallace, M E, Williams, D A
openaire +2 more sources
Nature or Nurture? A Note on the Misinterpreted Twin Decomposition [PDF]
The classical twin model has often been used to determine whether variation in outcomes such IQ, schooling and other behavioral traits, originate from genetic endowments or environmental factors.
Stenberg, Anders
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Improvements and Future Challenges in the Field of Genetically Sensitive Sample Designs [PDF]
Understanding the sources of individual differences beyond social and economic effects has become a research area of growing interest in psychology, sociology, and economics.
Frank M. Spinath
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Does Education Pay in Urban China? Estimating Returns to Education Using Twins [PDF]
This paper empirically estimates the returns to education using twins data that the authors collected from urban China. Our ordinary least-squares estimate shows that one year of schooling increases an individual¡¦s earnings by 8.4 percent. However, once
Hongbin Li +3 more
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