Can pitocin (oxytocin) in labor cause autism in children?

Not proven: There is one study that proposes, at the molecular level that an excess of oxytocin during birth could cross the infants blood brain barrier in sheep and mice. This was published almost 10 years ago, and as far as i know there has been nothing further. On the other hand there are some studies that are proposing the use of oxytocin to aid in repetitive behaviors seen in the autistic spectrum.

No evidence of this: 1970 was the first year i learned to use Pitocin (oxytocin) to induce or augment labor. No study has shown a causal relationship between intrapartum Pitocin (oxytocin) & autism. Several studies since about 2003 have shown that intranasal ( inhaled) oxytoxin improves social function in people with autism. http://childstudycenter.yale.edu/autism/research/brain-imaging.aspx is the ongoing study at yale child study center.