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Effect of Prepartum Energy Status and Lying Time on Stillbirth in Transition Dairy Cows

Menichetti, Bernardo Thomas
http://rave.ohiolink.edu/etdc/view?acc_num=osu1523460186946735

Abstract Details

2018, Master of Science, Ohio State University, Comparative and Veterinary Medicine.
The objective of the present study was to assess the effect of prepartum lying time (LT) and the coefficient of variation (CV) of LT within 7 d prior to calving on serum NEFA concentration and stillbirth. Pregnant animals (n=1052) from 3 commercial dairy herds were used in this study. Animals were housed in freestall barns using a prepartum pen 21 d before the expected calving date and were moved into a contiguous maternity pen at parturition. Monthly, cohorts of 20 to 36 animals (heifers and cows combined) were enrolled at each farm and electronic data loggers (IceQube, IceRobotics, Edinburgh, UK) were fitted to the hind leg of individual animals to assess their behavioral activity. Stillbirth was defined as a calf born dead or died during the first 24 h after parturition in cows with normal gestation length. The lying time was recorded for the last 7 d prior to parturition to assess differences among cows with stillbirth versus those with calf born alive. Blood samples for nonesterified fatty acids (NEFA) serum concentration were collected from prepartum animals at -7±3 d relative to calving. Blood samples for total serum calcium were collected from postpartum cows within 48 h after parturition. Data were analyzed using MIXED procedures of SAS. Dams experiencing dystocic births had greater proportion of stillbirth, but herd, parity and season did not have an effect. Dams with a stillborn calf had reduced (P<0.05) LT and increased CV of LT within the last 7 d before calving compared with cows with a calf born alive, regardless of parity. Multiparous cows with a stillborn calf had higher (P<0.05) prepartum serum NEFA serum concentration compared to iv multiparous cows with a calf born alive, but this did not differ for first-calf heifers. The proportion of postpartum dams with hypocalcemia was higher (P<0.05) for cows and first-calf with a stillborn calf compared to cows with a calf born alive. Regardless of parity, LT of prepartum animals was strongly correlated with the CV of LT (as LT increased, the CV decreased), and prepartum dams with a mean LT between 11 and 15 h/d had the lowest serum NEFA concentration compared to cows with LT of 8-10 or >16 h/d. These results suggest that prepartum lying time and its consistency, along with prepartum energy status may play an important role on calf survival at calving.
Gustavo Schuenemann (Advisor)
Alejandro Relling (Committee Member)
Alvaro Garcia Guerra (Committee Member)
106 p.
Veterinary Services
Stillbirth, Lying time, NEFA, Dairy Cattle

Recommended Citations

Citations

  • Menichetti, B. T. (2018). Effect of Prepartum Energy Status and Lying Time on Stillbirth in Transition Dairy Cows [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523460186946735

    APA Style (7th edition)

  • Menichetti, Bernardo. Effect of Prepartum Energy Status and Lying Time on Stillbirth in Transition Dairy Cows . 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1523460186946735.

    MLA Style (8th edition)

  • Menichetti, Bernardo. "Effect of Prepartum Energy Status and Lying Time on Stillbirth in Transition Dairy Cows ." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523460186946735

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.
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