Serum Amyloid A in Women With Unexplained Infertility

For determination of SAA level, a 5-ml sample of venous blood will be taken from each participant under aseptic conditions, and centrifuged at 2500 g for 15 minutes at 4°C c. separated into serum aliquots,and stored frozen at -80°C until analysis of SAA ,which will be done by a double-antibody sandwich Enzyme Linked Immunosorbent Assay (ELISA) kits supplied by cusabio,USA according to manufacturers instruction .Each sample was tested in duplicate and the average will be taken. A cut off level of 30 mg/L SAA level will be chosen to reflect a real increase in its level