Twin studies are studies conducted on identical or fraternal twins. They aim to reveal the importance of environmental and genetic influences for traits...

Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which...

Minnesota Center for Twin and Family Research (MCTFR) is a series of behavioral genetic longitudinal studies of families with twin or adoptive offspring...

Louisville Twin Study is a longitudinal twin study which was started in 1957 at the University of Louisville by Frank Falkner. It started with 885 twins that...

Bipolar Twin Study is an ongoing twin study of bipolar disorder running at the Institute of Psychiatry, King's College London since 2003. The study is investigating...

injured, and to advance Nazi racial ideology and eugenics, including the twin experiments of Josef Mengele. Aribert Heim conducted similar medical experiments...

inheritance of behaviour and mental illness in humans (typically using twin and family studies), as well as research on genetically informative model organisms...

contribute to the development of autism. Numerous studies, including twin studies and family studies, have estimated the heritability of autism to be around...

sociability.[medical citation needed] Twin studies have aided in breaking down the genetic vs. environment debate. A twin study conducted by the Department of...

anxiety disorder can play a role in the development of DPD as a 2004 twin study found a 0.81 heritability for personality disorders collectively. While...

Adoption/Twin Study of Aging (SATSA) was initiated in gerontological genetics. The research was executed on Twins Reared Apart (TRA) and Twins Reared Together...

Wellbeing and Sleep Problems: A Bivariate Twin Study". Twin Research and Human Genetics. 8 (5): 440–449. doi:10.1375/twin.8.5.440. PMID 16212833. S2CID 8833259...

the NASA Twins Study, which demonstrated several long-lasting changes, including those related to alterations in DNA and cognition when one twin was compared...

with twin studies suggesting 30-40% genetic influence on individual differences in anxiety. Environmental factors are also important. Twin studies show...

The International Society for Twin Studies (ISTS) is an international, non-profit scientific organization. The aim of the society is to advance research...

A vanishing twin, also known as twin resorption, is a fetus in a multigestation pregnancy that dies in utero and is then partially or completely reabsorbed...

epidemiology, the study of genetic factors in health and disease, in 1992. Spector is professor of genetic epidemiology and director of the TwinsUK registry...

related persons requires careful study because environmental factors may be correlated with genetic factors. Early twin studies of adult individuals have found...

Twin-to-twin transfusion syndrome (TTTS), also known as feto-fetal transfusion syndrome (FFTS), twin oligohydramnios-polyhydramnios sequence (TOPS) and...

nurture" twin study. They were adopted by separate families in the New York area who were unaware that each girl had a twin sister. Soon after the twins reunited...

behavior geneticists began using twin studies in the 1980s to study variation in social attitudes, and these studies suggested that both genes and environment...

The Twins Early Development Study (TEDS) is an ongoing longitudinal twin study based at King's College London. The main goal of TEDS is to use behavioural...

particularly in selective breeding and behavior genetics (for instance, twin studies). It is the source of much confusion due to the fact that its technical...

identical twin concordance around 25%, despite twins sharing genes and prenatal environments.: 356  Twin studies have also found that among twins with differing...

The third season of Twin Peaks, also known as Twin Peaks: The Return and Twin Peaks: A Limited Event Series, consists of 18 episodes and premiered on...

for any single cause, although many theories have been discredited. Twin studies indicate that at least some genetic factors are involved. Myopia has...

Twin Peaks is an American mystery-horror drama television series created by Mark Frost and David Lynch. It premiered on ABC on April 8, 1990, and ran for...

studies – studies that use scientific data and attempt to correlate it with actual human behavior. Examples include twin studies and adoption studies...

comparisons with notorious twin experiments by the same Nazi regime that Neubauer had escaped. Some of the subjects of Neubauer's twin study have sought records...

as males have nipples that serve no fitness-related function". A 2005 twin study found that one in three women reported never or seldom achieving orgasm...