title: Preface.
authors.affiliation: Pennsylvania State University, College of Medicine, Hershey Medical Center, 500 University Drive, Hershey, PA 17033, USA. Electronic address: plee@hmc.psu.edu.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Lee
authors.affiliation: Georgia Prevention Center, Georgia Regents University, Health Sciences Campus, 1120 15th Street, Augusta, GA 30912, USA. Electronic address: chouk@gru.edu.
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Houk
mesh_terms: D004700:Endocrine System Diseases / Q000150:complications*; D006801:Humans; D007246:Infertility / Q000209:etiology*