| 摘要 |
The present invention relates generally to a method for estimating the ti me elapsed within a gestation period of a pregnant or potentially pregnant r uminant, such as a cow. The method involves estimating the time elapsed with in a gestation period of a pregnant or potentially pregnant ruminant, includ ing the steps of providing a sample from the ruminant; calculating a value o f a pregnancy indicator in the sample; and applying a regression formula to the value of the pregnancy indicator to provide an estimate of the time elap sed within the gestation period. The method may further include the steps of categorising the pregnancy status of the ruminant, qualitatively assessing the level of the pregnancy indicator value for application thereto of the re gression formula, using the time elapsed to derive an estimate of a gestatio n-related event, and validating the estimated date of a gestation related ev ent. The invention further provides computer software to generate an estimat e of the time elapsed within a gestation period of a pregnant ruminant, and systems for generating an estimate of the time elapsed.
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