title: Interim analysis in clinical trials.
authors.forename: Hui-Chun Irene
authors.initials: HC
authors.lastname: Su
authors.forename: Mary D
authors.initials: MD
authors.lastname: Sammel
mesh_terms: D006063:Chorionic Gonadotropin / Q000008:administration & dosage* / Q000494:pharmacology*; D010064:Embryo Implantation / Q000187:drug effects*; D004624:Embryo Transfer / Q000379:methods*; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D018873:Pregnancy Rate
chemical_list: D006063:Chorionic Gonadotropin