Luteolysis in Bos indicus cows on Days 5 and 7 of estrous cycle with varying doses of PGF2α
| Autor: | Marcos Vinícius de Castro Ferraz Júnior, Michael L. Day, Marcos Vinicius Biehl, Delci D. Nepomuceno, M. H. Santos, Roberto Sartori, Daniel Montanher Polizel, Alexandre Vaz Pires, João Bosco Barreto Filho, José Renato Silva Gonçalves |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Luteolysis Estrous Cycle Biology Dinoprost 03 medical and health sciences Animal science Food Animals Oxytocics Internal medicine medicine Animals Small Animals Estrous cycle Dose-Response Relationship Drug Equine Incidence (epidemiology) 0402 animal and dairy science Estrus synchronization 04 agricultural and veterinary sciences 040201 dairy & animal science 030104 developmental biology Endocrinology Cattle Female Animal Science and Zoology |
| Zdroj: | Theriogenology. 86:1268-1274 |
| ISSN: | 0093-691X |
| Popis: | The aim of this study was to evaluate luteolysis using three doses of PGF2α on Day 5 or Day 7 of the estrous cycle in nonlactating Nellore (Bos indicus) cows. Cows (n = 323) were assigned within date of estrus (Day 0 of estrous cycle) to receive 12.5, 25.0, or 50.0 mg of PGF2α on either Day 5 or Day 7 of the estrous cycle in a 3 × 2 factorial arrangement. Blood samples for progesterone (P4) concentrations were collected at 0, 24, 48, and 72 hours after PGF2α to assess luteolysis (L). Luteolysis was defined on the basis of P4 concentrations at 72 hours using either less than 0.5 ng/mL (L0.5) or less than 1.0 ng/mL (L1.0) as the cut off. Luteolysis was considered "partial" when P4 concentration declined within 24 hours after PGF2α but failed to decline further or, in some cases, increased. Incidence of luteolysis was less (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect