J. B. Hall, R. B. Staigmiller, R. E. Short, R. A. Bellows, M. D. MacNeil and S. E. Bellows heifers Effect of age and pattern of gain on induction of puberty with a progestin in beef 1997, 75:1606-1611. J ANIM SCI http://jas.fass.org/content/75/6/1606 the World Wide Web at: The online version of this article, along with updated information and services, is located on www.asas.org by guest on July 13, 2011 jas.fass.org Downloaded from