Test code links throughout this Guide refer to the corresponding test in the User's Guide. Multiple forms of hCG are typically found in blood and urine, including the intact heterodimer as well as dissociated subunits.
Variations are also a result of post-translational modifications and degradation events.
Production of hCG is necessary for the maintenance of the early corpus luteum. It has recently been added to the maternal serum screen because elevated levels of hCG have been found to be associated with an increased risk of Down syndrome. Elevated AFP levels are also commonly found with these tumors. Maternal Serum Screening . Reports may vary based on instrumentation.