The Replacement Index is a monetary (€) figure which is expressed as profit per calving of each daughter i.e. a bull with a Replacement Index of €150 is expected to produce daughters that will leave, on average, €150 extra per calving over the base animal. There are 17 traits included in the Replacement Index. Each trait has its own Predicted Transmitting Ability (PTA). An animal’s PTA is the amount of a trait that it can pass on to its progeny. The PTA for each trait is then multiplied by the Economic Weight (monetary value for each unit of the trait). This generates a Euro value contribution for the trait. All of these values are then combined to add up to the overall Replacement Index. Table 1 details all of the traits included in the Replacement Index as well as their respective Economic Weights.