ABSTRACT
Various methods and tools have been developed to detect and manage pregnancy loss
in cattle to maximize reproductive efficiency by increasing pregnancy rates and decreasing
pregnancy loss. Embryonic mortality constitutes the majority of pregnancy loss in
cattle and can be divided into 2 periods: early embryonic mortality (<28 d of gestation)
and late embryonic mortality/early fetal mortality (≥28 d of gestation). Much research
has revolved around elucidating causes of early embryonic mortality; although little
is known about the mechanisms contributing to late embryonic mortality/early fetal
mortality, its effects can have significant economic consequences. Current pregnancy
diagnostic tools in cattle vary in accuracy until about d 28 of gestation. Refinement
of current pregnancy diagnostic tests, with the ability to be accurate at approximately
the third week of gestation, or the development of new methods that are able to assess
embryonic viability would both decrease the financial ramifications linked to embryonic
mortality and increase the reproductive efficiency of the herd. The following review
will highlight some techniques that have been reported to detect and predict pregnancy
loss and some of the potential management strategies that might mitigate these losses.
Key words
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Article info
Publication history
Accepted:
September 3,
2018
Received:
June 24,
2018
Footnotes
The authors declare no conflict of interest.
Identification
Copyright
Copyright © 2018, American Registry of Professional Animal Scientists. All rights reserved.
