Herd size :   average herd calving interval in days:   number of cows culled per 100 head for whatever reason :   average number of : inseminations per cow   Total cost of infertility £ Are you convinced of the potential savings ? To find out more why not contact us. Cost due to the calving interval : £ Cost due to the culling : £ Cost due to insemination : £ Please Note: These calculations are an illustration only and do not represent a detailed analysis. This illustration is based upon the following equation by Dr RJ Esslemont of the University of Reading (?): Calving interval: £3 x herd size x (average herd calving interval - 360) Culling rate: (number of cows culled per 100 head - 22) x £590 Insemination cost: (average number of inseminations per cow -1.3) x herd size x £20