There are lots of studies doing that. And it seems to help some patients on the spectrum with social memory, cues and the use of social informations. It also increases eye contact. But the long term effects are not clear yet, especially on children whose brains are still developing. In some studies with prairie vole pups, it was found that pups who where treated with oxytocin showed abnormal pair bonding and parental behavior as adults. Hope that helps answering your question