Artificial Insemination (AI) Calving Distribution

Most cattle producers know that the textbook gestation length of beef cattle is 283 days. Most also realize that biology is variable, and predicting the exact day of natural birth in most mammalian species is very difficult to do. However, some producers seem to forget these biological laws when using new technology in their breeding programs. Many producers associate artificial insemination (AI) with the cow herd behaving in very regimented and predictable ways.