The cause of PDD-NOS?

My have one son, 27 months, recently diagnosed as PDD-NOS, Vineland scales: communication 74, socialization 76. I have always wondered whether one incidence I had during early pregnancy has caused my son's disorder...as from my reading, autism could result from the disruption of normal brain development early in fetal development caused by defects in genes that control brain growth and that regulate how neurons communicate with each other.



Two years ago when I was 11-week pregnancy, I had the first appointment in hospital for pregnancy blood test. I was instructed by phone to eat more than usual for the blood test in the morning. When I got to the lab, a nurse bound my right arm extremely tight and drew six bottles of my blood (5 bottles of average size, and one bottle twice size of others) in less than one minute. She finished her job in such a swift speed that I was short of time to raise question why she took such huge amount for blood test.



That night, after my blood was drawn, I couldn't fall asleep because I had an extremely sore throat, inflamed tongue and my lips cracked very badly, I drank one gallon of cold water and frequented the bathroom all night. For the following two weeks, in addition to these symptoms each night, I have had bad headaches and developed a very poor appetite, my diet is basically pure starch (derived from wheat crackers) and water.



I have raised this issue to my doctor, but he said I am perfectly fine.The cause of PDD-NOS?
I really doubt that anything you did caused his PDD-NOS. I had a horrible stomach flu at 12 weeks pregnant with my daughter...she is fine, it is my 12 year old who has PDD-NOS.The cause of PDD-NOS?
So you are thinking that your son's autism might have been caused by the large blood draw, or that it might have been caused by the sickness that followed?



It's impossible to know unless there was a study done on a larger scale. Do you always have a strange reaction to blood being drawn?



I don't think it was an exceptional amount of blood you lost. Probably 98% of pregnant women get that much blood drawn in the first trimester. I did with each of my pregnancies.



Don't feel guilty, though. I don't think there's any way to figure out the cause of your son's autism.