RESEARCH ON THE DYNAMICS OF UTERINE INVOLUTION IN COWS TREATED WITH CLOPROSTENOL

G. Nacu, Șt. Ciornei, V. Maciuc, Raluca Donosă, Ferentz Szentpali

Abstract
   The aim of this study was to observe the effect of cloprostenol administration on the puerperal period development to 60 cows (30 Holstein Frisian and 30 Red Holstein). The protocol consisted in administering the first dose (2 ml Proliz) in the first 6 hours after calving and repeating it on the 11th day. In animals whose placenta was not removed in the first 12 hours after calving, manual extraction and treatment with oxytetracycline-based cartouche were performed. Starting with the 5th day after calving, the dynamics of the uterine involution was evaluated by transrectal examinations at 7-day intervals. Placental retention was recorded in 21.66% of all studied cows. Uterine involution ended at 19 days for 20% of the cows, observing also that there was not a placental retention. To the majority of the cows (71.66%), the uterine involution ended within 26-33 days after calving. It was noticed that to the cows with placental retention, the uterine involution ended within 33-40 days after calving. In the first two months after calving, 75% of the herd was inseminated, attaining a good conception rate (62.50% for cows with placental retention and 67.56% for those without retention). In conclusion, the application of this protocol for monitoring the puerperal period ensured the sexual cycles renewal and the cows insemination in an optimal time from a biological and technological point of view to 2/3 of the herd.