Serum concentrations of ergovaline/ergot alkaloids in late-term pregnant mares grazing endophyte-infected tall fescue pastures: A preliminary report

s / Theriogenology 70 (2008) 576–591 583 4500 treatment group (NC = 100.0 0.0%, 400 = 54.4 8.6%, 900 = 75.0 7.1%, and 4500 = 97.9 2.8%; P < 0.05). Centrifugation at 400 or 900 g did not damage equine sperm. Further studies of centrifugation forces between 900 and 4500 g are warranted to find optimal forces that maximize recovery rate, minimize sperm damage and do not affect fertility.