The causes of autism spectrum disorder (ASD) are complex and remain unclear. A recent study, involving more than 3.5 million children, now shows that the risk of ASD may slightly increase for each week a baby is born before or after 40 weeks of gestation. Autism spectrum disorder (ASD) is a neurodevelopmental disorder, affecting 1% to 2% of children worldwide. Children with this disease cannot initialize or take part in social communication and have repetitive behaviours. The reasons may be…