| Full text | |
| Author(s): |
Rocha, Cecilia Constantino
[1]
;
Martins, Thiago
[1]
;
Cardoso, Beatriz Oliveira
[1]
;
Silva, Luciano Andrade
[2]
;
Binelli, Mario
[3]
;
Pugliesi, Guilherme
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Anim Reprod, Pirassununga, SP - Brazil
[2] Univ Sao Paulo, Sch Anim & Food Sci, Dept Vet, Lab Theriogenol Dr OJ Ginther, Pirassununga, SP - Brazil
[3] Univ Florida, Dept Anim Sci, Gainesville, FL 32611 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Animal Reproduction Science; v. 201, p. 12-21, FEB 2019. |
| Web of Science Citations: | 2 |
| Abstract | |
The aim was to evaluate the associations between circulating P4 concentrations, corpus luteum (CL) size (diameter, area or volume) and blood perfusion (BP) in cows. In Experiment 1, Pearson's correlations (P < 0.05) with P4 concentrations were observed during CL development (D8) for total area (TA; r = 0.76), luteal area (ACL; r = 0.72), total and luteal diameter (TD and DCL respectively; r = 0.46). During mid-late diestrus, there was a positive correlation (P < 0.05) only at D15 with TA and ACL (r > 0.60), TD, total volume (TV) and luteal volume (VCL; r > 0.434). During luteal regression, the correlation was only observed at D18 for ACL (r = 0.478) and D20 with several variables. In Experiment 2, CL weight and ACL had the greatest correlation with P4 (r > 0.6). In Experiment 3, TA and ACL were the variables that were most closely correlated with serum P4 concentrations at D7 in recipient cows. Correlation coefficients were greater for luteal measurements when there were compact compared with cavitary CLs. In Experiment 4, there was no correlation (P > 0.05) between P4 and any of the variables measured on D4 and D7 in recipient cows detected in estrus. On D18 to D20, all CL characteristics were correlated. (P < 0.05) with plasma P4, and luteal BP and BP area were more closely (P < 0.05) correlated than ACL. In conclusion, CL perimeter area measurements had the greatest association with luteal function during CL development; whereas for BP there was a greater correlation with P4 than luteal size during luteolysis. (AU) | |
| FAPESP's process: | 17/13994-5 - Study of transcriptomic profile in immune cells of peripheral blood during early pregnancy in beef heifers |
| Grantee: | Cecilia Constantino Rocha |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 16/23964-3 - Innovations in early pregnancy diagnosis in cattle |
| Grantee: | Guilherme Pugliesi |
| Support Opportunities: | Scholarships in Brazil - Young Researchers |
| FAPESP's process: | 15/10606-9 - Innovations in the early pregnancy diagnosis in cattle |
| Grantee: | Guilherme Pugliesi |
| Support Opportunities: | Research Grants - Young Investigators Grants |