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We tested whether maternal vitamin D insufficiency during pregnancy is related to the autism phenotype.

There is accumulating evidence that autistic traits (AT) are on a continuum in the general population.

We investigated the relationship between autistic-like traits in early childhood and age at menarche in typically developing girls.

The current investigation measured AT in 360 males and 400 males from the general population close to two decades apart, using the Pervasive Developmental...

We used population data on Western Australian singletons born from 1984 to 1999 (n = 398,353) to examine the sociodemographic characteristics of children...

Fetal head circumference (HC) growth was examined prospectively in children with autism spectrum disorder (ASD).

The etiology of autism spectrum disorders is unknown but there are claims of increasing prevalence in many countries.

Prenatal exposure to testosterone has been shown to affect fetal brain maturation as well as postnatal cognition and behavior in animal studies.

This is the first prospective study to identify an association between early life testosterone exposure and pragmatic language difficulties in girls

Birth order effects have been linked to variability in intelligence, educational attainment and sexual orientation. First- and later-born children have been linked to an increased likelihood of an Autism Spectrum Disorder (ASD) diagnosis, with a smaller body of evidence implicating decreases in cognitive functioning with increased birth order. The present study investigated the potential association between birth order and ASD diagnostic phenotypes in a large and representative population sample.