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.
Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your healthcare provider. The normal range for a complement C3 blood test is 80 to 160 milligrams per deciliter (mg/dL), or 0.8 to 1.6 grams per liter (g/L).Your complement levels will often shoot up dramatically just after an infection or injury.his test measures the amount of C3 proteins in your blood. These proteins are part of your complement system, which plays an important role in your immune system.