| For the correlation analysis, 20 unrelated couples were formed by randomly matching one monozygotic twin with one dizygotic twin. |
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| Increasing use of fertility drugs is almost certainly the main cause of the recent increase in dizygotic twinning in most developed countries. |
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| Two well conducted and well controlled studies show that refractive errors are much more strongly correlated in monozygotic twins than in dizygotic twins. |
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| Obviously, the twins resulting from superfecundation are dizygotic. |
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| The results suggest that although monozygotic twins do differ epigenetically, they differ less than dizygotic twins. This is all very confusing. |
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| However, these studies may have overestimated the effect of genetics if monozygotic twins share exposure to more environmental effects than dizygotic twins do. |
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| The body of research on homozygotic and dizygotic twins and on siblings is strongly affected by the non-demonstrated presumption that the children always grow up in the same environment. |
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| This registry involves a large-scale sample of monozygotic and dizygotic twin pairs who served in the military during the Vietnam era. |
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| The higher rate of autism in monozygotic as opposed to dizygotic twins, as well as the increased sibling recurrence risk and the presence of the broad phenotype in family members support this theory. |
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| If there is greater agreement or similarity in a characteristic with monozygotic twins and greater variability in dizygotic twins or in the general population, this speaks for the hereditary character of this characteristic. |
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| However dizygotic twins share no more DNA than ordinary siblings. |
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| A higher prevalence is noted among family members of people with schizophrenia, and there is a higher concordance rate in monozygotic than dizygotic twins. |
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| In 2 dizygotic twin cases, large regional fluctuations in ff were observed, consistent with dizygosity. |
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| I was not alone, moreover. I had a dizygotic twin, a female. |
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| We note how de novo mutations may also help explain why the concordance rate for autism is so markedly higher in monozygotic than dizygotic twins. |
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| More than half of monozygotic multiple births are monochorionic, which may lead to a greater risk of adverse outcomes than for dizygotic multiple births. |
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