BONNEAU, M. and BIDANEL, J. 1998. Foreword: The increase in sow prolificacy : present knowledge, possible developments and consequences. Communications presented during a meeting of the INRA Commission on Pig Research. INRAE Productions Animales. 11, 3 (Jun. 1998), 211–256. DOI:https://doi.org/10.20870/productions-animales.1998.11.3.3939.