Postnatal daily administration of oxytocin (2 μg day–1 in the first 2 days or postnatal week) has been shown to increase pre‐ or post‐synaptic transcript levels of neurexins and neuroligins159 and to prevent deficits in social behaviour and learning abilities in adult Magel2‐deficient mice, a mice model of Prader–Willi syndrome and autism spectrum disorder.160. Here, OXT is linked to autism spectrum disorder.