GCG and congenital bilateral aplasia of vas deferens from CFTR mutation: Serum Similar to the IHC result for calcific aortic valves, serum GLP-1 was significantly reduced in the CAVD group [Non-CAVD: median = 14.00 pmol/L (25th−75th percentile 9.34–19.02 pmol/L; range 0.38–39.37 pmol/L) vs. CAVD: median = 11.29 pmol/L (25th−75th percentile 8.17–14.92 pmol/L; range 0.05–31.93 pmol/L), P < 0.001] (Table 2).