The method and results for a project looking at the effect of hormone induction of puberty in gilts on longevity and performance. Half of the gilts were injected with PG600® at 153 days of age, and half were left as controls. Gilts were bred, weaned, and some were reassigned as nurse sows. After 1 or 2 weanings, sows were randomly assigned for another treatment of PG600®. The results show the first treatment group of PG600® had larger litters, but the same number weaned between groups. PG600® increased the percent of sows bred within 8 days of weaning from 66% to 85%. As well, nurse sows had larger next litters, and an increased percent bred within 8 days of the second weaning.