For the first time, new European research has found a link between high levels of estrogen sex hormones in the womb and an increased risk of developing autism.
The findings, published on Monday in the journal Molecular Psychiatry, showed that all four estrogens were significantly higher, on average, in the 98 male fetuses who later developed autism, compared to the 177 male fetuses included in the study who did not. As these androgens are produced in higher quantities on average in male than in female fetuses, the 2015 findings might also explain why autism occurs more often in boys.
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