A good start in life is of high importance for every animal. One of the most effective ways to influence health of newborns is via genetics. Influencing genetics is a long term process, especially in pig husbandry. Increasing litter size and weight, however, brings forth a negative side effect as young sows cannot consume as much energy as is required for the suckling piglets. This also results in a negative energy balance of the sow, mainly in second parity.