For the album by the band The White Stripes, see White Blood Cells (album) . White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.or the album by the band The White Stripes, see White Blood Cells (album) . White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.
Amniocentesis can also be used to determine the maturity of the fetal lungs or the cause of a fever in the mother. For genetic testing, chromosome analysis, and the evaluation of an abnormal alpha feto-protein test, amniocentesis is usually performed between the 16th and 21st weeks of pregnancy.
The results can help you decide whether to have amniocentesis, an invasive diagnostic test, to find out for sure about your baby's condition. Screening tests tell you how likely it is that your baby has a condition, but only a diagnostic test like amniocentesis tells you whether your baby actually has the condition. While the quad screen carries no risk for the mom or baby, amniocentesis does have a small risk of miscarriage.