Coagulation profile of dairy cattle in the periparturient period.

A coagulation profile including prothrombin time (PT), partial thromboplastin time (PTT), thrombin time (TT) and fibrinogen concentration was determined in 52 clinically healthy German Black Pied cattle during the periparturient period. In these cows a hypercoagulability appeared within the first 48 hours after parturition. Prothrombin time and partial thromboplastin time for these animals were significantly shorter than those of nonpregnant animals.

Physiological coagulation profile of dairy cattle.

90 clinically healthy cattle with a normal estrus cycle (German Black Pied) were investigated. Normal values for the physiological coagulation profile including prothrombin time, partial thromboplastin time, thrombin time, and fibrinogen concentration were determined. The following ranges of normal values (means +/- 2SD) were calculated: prothrombin time (PT) 20.