Oestrus synchronisation in postpartum dairy cows using repetitive prostaglandin doses: Comparison between D-cloprostenol and dinoprost.
This trial evaluated the reproductive performance in an early routine oestrus induction programme using two different PGF2α preparations in dairy cattle. D-cloprostenol sodium (n = 192; Group A) or dinoprost (n = 187; Group B) was administered between days 35 and 42 post partum. Also, a group of non-treated cows (n = 135; Group C) was included as control. Pedometers were used to detect oestrus, and also secondary oestrous signs and vaginal mucus quality were assessed prior to artificial insemination (AI). When oestrus was not detected for 14 days after PGF2α administration, the treatment was repeated, up to a maximum of three times. There were no differences between the study groups in oestrus detection (A = 73.48%, B = 73.01%, C = 79.26%; P = 0.428), good mucus quality (A = 96.45%, B = 91.30%, C = 93.45%; P = 0.203) and the presence of mounting lesions (A = 98.58, B = 94.93%, C = 98.13; P = 0.414). First-service pregnancy rates were 19.78%, 15.64% and 32.03% in Groups A, B and C, respectively (P = 0.003). There were no inter-group differences for the interval from parturition to first AI. However, a significantly shorter interval from parturition to conception (92.17 days, 99.45 days, 118.93 days; P = 0.002) and significantly less services per conception (2.12, 2.18, 2.66; P = 0.003) were observed in Groups A and B in comparison with Group C. The use of PGF2α resulted in better fertility in a repetitive, routine postpartum programme, although no differences between Dcloprostenol and dinoprost were detected.
University of Córdoba, Campus de Rabanales Department of Animal Medicine and Surgery Ctra Madrid-Cádiz km 396 14071 Córdoba Spain.
Carlos Carmelo
CC
Pérez-Marín
University of Córdoba, Campus de Rabanales Department of Animal Medicine and Surgery Ctra Madrid-Cádiz km 396 14071 Córdoba Spain.
Jose María
JM
Sánchez
University of Córdoba, Campus de Rabanales Department of Animal Medicine and Surgery Ctra Madrid-Cádiz km 396 14071 Córdoba Spain.
Guillermo
G
Vizuete
University of Santiago de Compostela Department of Animal Pathology Lugo Spain.
Luis Angel
LA
Quintela
University of Córdoba, Campus de Rabanales Department of Animal Medicine and Surgery Ctra Madrid-Cádiz km 396 14071 Córdoba Spain.
Laura
L
Molina
Oestrus cycle; bovine; prostaglandin F2 alpha; reproductive performance