RESUMO
A variety of environmental factors and management practices influences fertility and fecundity in the gilt and sow. By studying the biological processes involved in controlling reproduction and by evaluating how theseprocesses change in response to environment and management, it is possible to develop procedures for enhancing reproduction. Many of the factors that influence fertility exert their influences on the hypothalamic-pituitary-ovarian axis in the pig. The focus of research in our laboratory has been on this axis and how altering management practices influences this axis and in turn alters reproduction. Overall, it is clear that one can use management strategics to improve reproduction, if one understands the mechanisms that need to be influenced in order to effect change