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.
First Trimester: Complete Blood Count (CBC) The complete blood count (CBC) is a test that evaluates the cells that circulate in blood. Blood consists of three types of cells suspended in fluid called plasma: red blood cells (RBCs), white blood cells (WBCs), and platelets (PLTs). To identify and prevent problems, a CBC may be done before pregnancy, if possible, at the beginning of pregnancy, and one or more times during pregnancy.