Sentences with phrase «twin studies show»

Moreover, given the high heritability of both conditions (Faraone et al. 2005; Freitag 2006), it is of note that family and twin studies show co-heritability (Lichtenstein et al. 2010; Lundström et al. 2011; Mulligan et al. 2009a; Nijmeijer et al. 2009; Taylor et al. 2012).

Segal, Nancy L., Ph.D. «New Twin Studies Show...» Psychology Today Oct. 1999: 54 - 59 and 69 - 70.

Twin studies show a higher concordance of AD among monozygotic compared to dizygotic twins, with heritability estimates of 60 % to 80 %.

Because twin studies show approximately a 50 % risk of developing schizophrenia in identical twins (meaning siblings with exactly the same genes), environment must have significant influence in the brain disorder.

The identical twin studies show that genes were overwhelmingly dominant in IQ differences.

«These twin studies show that there's a genetic basis for the differences in how easy or enjoyable children find learning.»

We're more than the product of our genes and environment, twin studies show.

These findings could explain why twin studies show that homosexuality runs in families, but no «gay gene» can be found, Rice said.

These findings could explain why twin studies show that ho - mose - xuality runs in families, but no «gay gene» can be found, Rice said.

Not exact matches

A recent study involving twins showed that they probably just have a particular genetic mutation that means they require less sleep.

These studies done with identical twins show that an individual's preference has as much to do with nature (ie.

So far, the studies of specific genes have shown conflicting results as to whether they cause hyperovulation or increase the chance of having fraternal twins.

Population studies have shown that some groups of people have twins much more frequently, while twins are rare among other groups.

A 2011 study showed that the highest rates of twinning were found in Central African populations, with the country of Benin producing the most twins.

Numerous studies have shown that women 35 years and older are more likely to conceive fraternal twins than their younger counterparts.

Another study showed that delivering a second twin by cesarean because he's not in the head - down position poses a risk of infection and provides no clear benefit for the infant or its mother.

Studies show a higher rate of identical twins (up to 20 times with IVF) in women having these treatments than occur naturally.

Other studies show that the risk of SIDS may be higher when babies sleep with other children, but no study has been done to show whether it is safe to let twins sleep together.

We found only one other study, conducted in the United States, on mortality associated with breech, twin, and post-term births at home.9 This study showed excess mortality in such home births and voiced concern about the trend to encourage midwives to engage in high risk practice.

A study done by looking at 158 pregnant women who underwent selective reduction from higher order multiples to twins showed that the mother had a 10.6 % chance of miscarriage.

A study by Antsaklis [33] showed a small increase in mortality for reduced twin pregnancies versus unreduced twin pregnancies.

Studies have documented that twins are more likely to demonstrate delays in speech and language skills, with males typically showing a six - month greater lag than females (Lewis & Thompson, 1992).

Studies show that a woman who has had twins before is four times likely to conceive twins again than a woman who has never had twins.

This concept is primarily based on a 1977 study published in the New England Journal of Medicine that showed women who got pregnant shortly after stopping oral contraceptives were twice as likely to have twins.

Yet another large study in 1987 showed no association between twins and taking oral contraceptives.

Studies show that women who have twins have had their chances of developing this condition dramatically increase.

Studies on twin do NOT show increased rates of rupture with a C - section scar, possibly because many deliver earlier in the pregnancy and so many women have a Cesarean section without labor anyway.

A major study conducted on twins shows that environmental factors may be at least as important as genes in causing autism.

So subsequently people have been looking at this type of brain activity and this brain activity is very highly related to a person's genetic makeup, and they've looked at this through twin studies again, showing that identical twins had more similar patterns than non-identical twins.

«This study also shows us that even identical twins can vary quite a lot on facial features, but because of the key areas being genetically controlled, we perceive them as being «identical,»» added Professor Tim Spector, Director of the TwinsUK study at King's College London.

FLAGGED A certain pattern of chemical tags on DNA shows up more often in gay men than in straight men, a controversial study in twins suggests.

Based on a three - year study with intensive measurements at three different locations in Aarhus, they divide the grass pollen season into three periods, as shown in the graph below: a twin peak profile during the early season, a single evening profile in the middle season and a single midday profile during the late season.

Studies have shown that if one identical twin has autism, there is at least a 60 percent chance that the other also does.

The results, reported last October, show that even the youngest fetuses in the study recognized and responded to the other twin.

A long - term follow - up study of 3050 twins from the Finnish Twin Cohort has shown that midlife, moderately vigorous physical activity is associated with better cognition at old age.

A study of identical twins and of unrelated individuals shows that differences in chemical changes to TRPA1, a gene that directs the production of a temperature - sensing protein, is connected to pain tolerance.

Twin studies, for example, have shown that genetic factors determine about 80 % of the variation in how bones fare with age.

And other studies have shown that even the identical twin of a gay man has only a 50 per cent chance of being gay himself.

Not only that, but studies of twins and adoptees have shown that about 50 percent of each person's happiness is determined from birth.

Past behavior genetics research using twin study survey data has shown genetic influence on a wide range of communication behaviors.

Bru Cormand, head of the Research Group on Neurogenetics at the Department of Genetics of the UB, affirms that «studies made with monozygotic (genetically identical) and dizygotic twins show that genetic factors play a major role in the aetiology of the disease.»

However, previous studies have shown that identical twins share more T cell receptors than would be statistically expected.

The idea is based in part on studies that show identical twins to have more similar levels of life satisfaction than non-identical twins, and suggests that although your level of happiness may occasionally be thrown off by major life events, it will always return to a set level within two years.

The study shows that the twin design remains a key tool for genetic discovery.»

Constellation of factors Twin studies have shown that identical twins (who share the same genes) are more likely to both suffer from the disorder than fraternal twins, which has demonstrated that «there's a large genetic component to the disorder,» Cantor says.

A recent study has shown that, if one identical twin has ASD, the likelihood of the other twin having it is between 77 and 99 percent; for fraternal twins, the likelihood is 22 to 65 percent.

Twins in the study whose genomes showed a low risk for Alzheimer's, for example, did have about a 12 percent (thus, much, much smaller) risk than that of the general population (which, to begin with, has a relatively small risk of getting Alzheimer's during their lifetimes).

Bovine growth hormone is also known to stimulate the production of insulinlike growth factor 1 (IGF1) by the liver; some studies have shown that high levels of IGF1 in the bloodstream may heighten the risk of prostate and breast cancers as well as a woman's chance of conceiving twins.

«New urban heat island study shows surprising variation in air temperatures across Twin Cities: Results provide valuable insights into efforts to reduce heat - related harm in metro areas globally.»

Twin studies have shown that genes probably have a lot to do with this, suggesting that they account for between 43 % and 58 % of the variability in coffee - drinking habits.