A CBC test counts for the different elements in the blood. These elements are used to diagnose diseases and infections that can affect the health of an individual. Especially during pregnancy, doctors prescribe women to go through a complete CBC test to detect any abnormal changes in the blood components. A complete CBC test in pregnancy may help detect various health problems like anaemia, clotting disorder, and other infections. While the higher levels of CBC test in pregnancy may indicate heart disease, autoimmune disorder, bone marrow disease, or any infection present in the body, a lower CBC level may denote anaemia, iron deficiency, or medication side effects.