Banca de DEFESA: IZABELA CRISTINA LEMOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : IZABELA CRISTINA LEMOS
DATA : 29/10/2018
HORA: 12:30
LOCAL: Auditório da Embrapa
TÍTULO:

ASSOCIATION BETWEEN UTERINE HEALTH AND FERTILITY OF POST-BREEDING COWS SUBMITTED TO FIXED-TIME ARTIFICIAL INSEMINATION

PALAVRAS-CHAVES:

Beef cows, uterus, pregnancy rate

PÁGINAS: 37
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:

The satisfactory restoration of uterine function in the postpartum period is fundamental for the beef cows to present adequate fertility when submitted to fixed-time artificial insemination (IATF) protocols. The objective of this study was to evaluate the relationship between uterine health and fertility of cows submitted to IATF programs initiated between 20 and 60 days postpartum (DPP). This study was performed with 244 Nelore multiparous cows (Bos taurus indicus) in the postpartum period. These bovine females were separated into 3 groups according to the postpartum days (DPP): 1) Group <30DPP (n= 64), composed of cows with DPP between 20 and 30; 2) Group <45DPP (n= 115), composed of cows with DPP between 31 and 45; 3) Group <60DPP (n= 65), composed of cows with DPP between 46 and 60. On day 0 of the IATF protocol endometrial cells samples were collected (cytobrush). Blades with the samples were prepared and submitted to evaluation for polymorphonuclear cell counts (PMN) under microscopy. Cows in the <30DPP group (19/64 = 29.7%) presented a lower (P <0.05) pregnancy rate per AI (P/AI) than cows in the <45DPP groups (52/115 = 45.2%) and <60 DPP (34/65 = 52.3%). Uterine discharge and the proportion of PMN cells decreased with increasing postpartum days. These results indicate that females with higher PMN have healthier uterus and tend to have a higher pregnancy rate / AI, indicating that animals with more than 30 postpartum can be included in the IATF programs. Animals qualified with appropriate ECC by the Vetscore® device (green) had an increase in pregnancy/AI when compared to females in the other categories.

MEMBROS DA BANCA:
Presidente - 958.305.370-87 - LUIZ FRANCISCO MACHADO PFEIFER - UFPel
Externo à Instituição - LÍGIA MARGARETH CANTARELLI PEGORARO - UFPel
Externo à Instituição - JORGEA PRADIEÉ - UFPel