Why do we need sex-balanced studies of autism?

Nordahl (2023) wrote a position paper. It says autism studies enroll far more boys than girls.

The paper argues this habit hides how autism looks and feels in females.

No new data were collected; the author mapped the problem and told teams to fix it.

The review shows most autism samples are over 80% male.

Because girls are scarce in studies, we know little about their traits, needs, or outcomes.

Wu says equal numbers of males and females must be recruited in every future project.

Hodge et al. (2025) extends the warning. In a Sydney clinic, girls were assessed six months later than boys even when IQ and daily skills were the same. The real-world delay proves the male-heavy lens costs girls time.

Mandy et al. (2012) and Fusar-Poli et al. (2017) supply earlier evidence. Large reviews already showed girls display milder repetitive play and calmer classroom behavior. Wu pulls these facts together and calls the next step: balance the samples.

Szakal et al. (2026) is already answering. Their upcoming meta-analysis will test whether the “extreme male brain” profile is even stronger in autistic girls. The move from Wu’s plea to Cory’s new data shows the field can pivot quickly once sex balance is required.

If your intake roster is mostly boys, pause and ask why. Screen girls who show subtle social stress or sensory issues. Add equal sex enrollment to your next grant or ethics form. Balanced samples give you valid norms, earlier detection for girls, and interventions that fit the whole spectrum.