Effect of assisted calving on uterine puerperal disorders occurrence, and on reproductive efficiency in crossbred dairy cows

Luís Fernando Faria Coury; Carla Cristian Campos; Giovanna Faria de Moraes; Natani Reis; Ricarda Maria dos Santos

doi:10.1590/1809-6891v24e-75064E

Authors

Luís Fernando Faria Coury Centro Universitário de Patos de Minas (UNIPAM), Patos de Minas, Minas Gerais, Brasil https://orcid.org/0000-0002-6971-6715
Carla Cristian Campos Universidade Federal de Uberlândia (UFU), Uberlândia, Minas Gerais, Brasil https://orcid.org/0000-0001-5525-994X
Giovanna Faria de Moraes Universidade Federal de Uberlândia (UFU), Uberlândia, Minas Gerais, Brasil https://orcid.org/0000-0003-4123-7031
Natani Reis Universidade Federal de Uberlândia (UFU), Uberlândia, Minas Gerais, Brasil https://orcid.org/0000-0002-1076-0121
Dra Universidade Federal de Uberlândia (UFU), Uberlândia, Minas Gerais, Brasil https://orcid.org/0000-0001-6118-7962

DOI:

https://doi.org/10.1590/1809-6891v24e-75064E

Abstract

The aim of this study was to evaluate the effect of the type of calving (normal or assisted) on the occurrence of puerperal uterine disorders and on the number of artificial inseminations (AI) per conception and pregnancy rate at 150 days postpartum (PPD). Cows were observed during parturition and the type of calving was classified as normal or assisted. Normal calving required no human interference, while assisted calving required a calf removal aid via vaginal access. There were 825 births, 7 stillbirths (0.85%) and 17 twins (2.06%). We analyzed 801 single births, from which 766 (95.63%) were normal and 35 (4.36%) assisted. Were evaluated the uterine disorders occurrence such as retained placenta combined with metritis (PR/ME) and clinical endometritis (CE). The overall occurrences were 10.24% (82/801) of RP/ME, 12.86% for CE and 5.12% for RP/ME and CE. Most of normal calving cows had healthy puerperium (73.89%), whereas a majority of assisted calving cows had uterine disorders (74.29%). The number of AI per conception was similar for cows that had either normal or assisted calving (2.39±0.08 and 3.00±0.43, P = 0.16). There was no evidence of negative influence of calving type on the 150 PPD pregnancy rate of lactating crossbreed dairy cows (P = 0.44). Healthy cows had higher 150 PPD pregnancy rate than cows affected by puerperium uterine disorders (51.65 vs. 42.92%). Normal calving crossbred dairy cows had a healthier puerperium, compared to cows with assisted calving which were more susceptible to puerperium uterine disorders. And cows with a health puerperium have a higher pregnancy rate at 150 days postpartum.
Keywords: calve; metritis; puerperium; pregnancy rate.

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