Per the Boston study the higher percentile ASD traits associated in males with female siblings on the spectrum, were more likely associated with language development delays, that at least the two studies linked above suggest females may be protected from to some degree potentially because of biological determinants.

FORBES: Is Being Female Protective Against Autism?

While a study is currently in progress at this point in time with the same research group linked below, specific to those with autism spectrum disorders, the linked research suggests that language development delays in the general population are associated with high levels of prenatal testosterone among males but high levels of prenatal testosterone among females provides a protective effect for language development.

FORBES: Is Being Female Protective Against Autism?