Based on the available search results, it is not possible to accurately predict the sperm count in 2045. However, some studies suggest that if current trends continue, the median sperm count of the average man in Western countries could reach zero by 2045. This means that half of all men would have zero viable sperm and the rest would have very close to zero. It is important to note that these predictions are extrapolations from current data and are not certain. Additionally, there are some concerns about the methodology of these studies and the accuracy of using sperm count as a predictor of male fertility and overall health. Therefore, it is not possible to provide a definitive answer to this question.