In Holland, research of Schothorst Feed Research shows that calves that have a higher growth before weaning produce more milk during the first three lactations. Calves with a growth of 500 grams per day, 500 till 750 grams and calves with more than 750 grams growth per day compared shows that 100 grams extra growth results in 109 kilogram fat corrected milk or 9.4 kilogram butterfat extra during the first lactation. However: there was much variety. Birth weight did not have influence.