Discuss about the detection of oestrus and artificial insemination in dairy cows.

Detection of oestrus and artificial insemination are crucial aspects of dairy cattle breeding and herd management. Oestrus, also known as heat, is the period of sexual receptiveness in female cattle when they are fertile and able to conceive. Artificial insemination (AI) is a method of breeding cows in which semen from a bull is introduced into the cow's reproductive tract using a reproductive tool called an inseminating gun.

Detection of Oestrus: Oestrus in dairy cows can be detected by observing changes in their behavior, physiological changes, and visual examination of the reproductive tract. The following methods are commonly used to detect oestrus in dairy cows:

1. Behavioral observations: One of the most common ways to detect oestrus in dairy cows is to observe changes in their behavior. During heat, cows may become more restless, _________ _______ _____ ___ _________ __________ ______.
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