Letrozole, Gonadotropin, or Clomiphene for Unexplained Infertility

Michael P. Diamond, Richard S. Legro, Christos Coutifaris, Ruben Alvero, Randal D. Robinson, Peter Casson, Gregory M. Christman, Joel Ager, Hao Huang, Karl R. Hansen, Valerie Baker, Rebecca Usadi, Aimee Seungdamrong, G. Wright Bates, R. Mitchell Rosen, Daniel Haisenleder, Stephen A. Krawetz, Kurt Barnhart, J. C. Trussell, Dana OhlYufeng Jin, Nanette Santoro, Esther Eisenberg, Heping Zhang