The abstract for a study on the effect of birth and weaning weight on later growth rates. Two databases were analyzed, and growth rates calculated from the information provided. Three methods of analysis were used. The logical regression supported low birth and weaning weight leading to a poorer growth performance. The linear plateau model showed birth and weaning weight not having a linear relatinoship with growth. Finally, weight category analysis showed that pigs with low birth and weaning weights can compensate later, and move up a weight category.