Some unique buffalo calves were born at the Ontario Buffalo Company in Stirling, ON. Their genetic mothers were only 4 months of age at the time their oocytes were collected by laparoscopy, fertilized and cultured in vitro and implanted one week later in adult recipients that carried the pregnancies to term. All procedures except the transfer to the recipient cows were conducted at the Large Animal Research Unit (LARU) in Macdonald Campus, under supervision of Drs.