Bio-Rad presents Liquichek Maternal Serum II Control designed to monitor the precision of immunoassay test procedures used during maternal serum screening. The control includes AFP, free estriol, hCG, and inhibin A, making it ideal for laboratories performing triple or quadruple marker screening. The liquid form eliminates the need for reconstitution, increasing efficiency and allowing samples to be treated the same as patient specimens. As an independent quality control, Liquichek Maternal Serum II Control is not optimized for a specific test system and provides laboratories greater confidence in patient results. The assayed control is available in three individual levels.