Every birth demonstrates it again: fertility is an essential aspect of dairying. Heat detection plays a critical role in this. Cows and heifers, first of all, need to come into heat. Next, the heat needs to be observed so that the cow can be inseminated at the right moment. The likelihood of success in this process can be improved in various ways. Whether through natural aids or highly advanced technologies; the solutions available to farmers for improving heat detection are all fascinating.