Assessment of the blood pregnancy-specific protein B test to determine pregnancy in free-ranging elk (Cervus elaphus)

The serum pregnancy-specific protein B test was analyzed as an alternative pregnancy test for free-ranging elks. It used post-mortem uterine examinations as the gold standard. The serum test used was BioPRYNwild, an enzyme-linked immunosorbent assay performed by Biotracking, Inc. Embryos ranged in age from 13 to 111 days (n = 77). The BioPRYN(r)wild test had a sensitivity of 93-95% and specificity of 91-93%. The positive and negative predicted values were 87-90-% and 95-96% respectively.