Recently a report by children's National Hospital research team was presented at the Neuroscience 2019 annual meeting. The findings of the repost say that allopregnanolone one of many hormones produced by the placenta during pregnancy is so essential to normal fetal brain development that the decrease in the supply can cause Autism. This steroid has important association with brain development and it also impacts child’s long-term behaviour. Decrease in the level of allopregnanolone causes irreversible and long-term alteration to the cerebellum—the part of the brain that’s responsible for the motor coordination and social cognition. Unfortunately whenever the role of placenta