| Acid Phosphatase-Prostatic | 
| A.C.T.H | 
| Aldosterone | 
| Adenosin Deaminase | 
| Acid Phosphatase-Total | 
| Anti - TG | 
| Anti Smooth Muscle Ab. (IF) | 
| ASA=Anti-Sperm Ab.(ELISA) | 
| ASCA | 
| Alfa-1 Anti-Trypsin (Neph) | 
| ACE | 
| Alkaline  Phosphatase | 
| ALT (SGPT) | 
| Amonia | 
| Amylase | 
| ANCA - C/P | 
| Anti - DS-DNA | 
| Alfa - Feto Protein  | 
| Albumin | 
| Amino Acid Assay - Serum | 
| Amniotic Fluid-Billirubin | 
| ANA   | 
| Anaerobic C | 
| Androstendione | 
| Anti - Mitochondrial Ab. (IF) | 
| Anti - Phospholipid Ab(IgG&M) | 
| Anti-Thrombin III=AT-III | 
| ASO-Titer | 
| AST (SGOT) |