A new report shows the brains of autistic children, who suffer from the disorder tied to a combination of contributing factors from genes to the environment, have differences in regions that develop during the mother's second trimester of pregnancy.
Complement component 4 is a blood test that measures the activity of a certain protein that is part of the complement system. The complement system is a group of proteins that move freely through your bloodstream.
1 A Complete blood count (CBC), a blood test that measures all the different components of your blood. 2  A medical and family history that can indicate whether you've become anemic due to illness or a genetic condition.  A physical exam that can tell whether your breathing or heartbeat has become irregular due to anemia.