An Exploration of Physical and Phenotypic Characteristics of Bangladeshi Children with Autism Spectrum Disorder.

Doctors in Bangladesh measured head size and watched kids play. They looked at boys and girls who already had an autism diagnosis.

The team used regular clinic tools like tape measures and the ADOS. They wrote down what each child could do in social games and pretend play.

Boys with autism had bigger heads than typical boys. Girls with autism did not show big heads, but they scored lower on sharing and pretend-play tasks.

In short: boys grew larger heads, girls showed larger social gaps.

Fyfe et al. (2007) saw the same girl-boy split in toddlers. Girls played better visually, yet lagged in talking and social games once visual skill was counted.

Backer van Ommeren et al. (2017) looked only at give-and-take play in Europe. They found girls with autism looked better than boys, not worse. The two studies seem to clash. The gap closes when you see Tineke used a narrow reciprocity scale while Ashiquir used wider ADOS social and play items.

Zhou et al. (2018) tracked Australian baby boys. By age three, boys with autism also had faster head growth, matching the Bangladeshi boys. The bigger-head signal travels across cultures.

When you assess a child from Bangladesh, measure head size in boys and probe social play in girls. Do not rely on one sex-norm table. Update your ADOS cut-off or add play probes if the client is a girl. Share these norms with pediatricians so referrals do not miss girls who look "fine" in quick chats.