Heterogeneity in patient populations explains differences in in vitro fertilization programs**Presented in part at the 45th and 46th Annual Meetings of the American Fertility Society, San Francisco, California, November 13 to 16, 1989, and Washington, D.C., October 13 to 18, 1990.
Hershlag A, Kaplan E, Loy R, DeCherney A, Lavy G. Heterogeneity in patient populations explains differences in in vitro fertilization programs**Presented in part at the 45th and 46th Annual Meetings of the American Fertility Society, San Francisco, California, November 13 to 16, 1989, and Washington, D.C., October 13 to 18, 1990. Fertility And Sterility 1991, 56: 913-917. PMID: 1936326, DOI: 10.1016/s0015-0282(16)54664-0.Peer-Reviewed Original Research