title: Defining case-control studies.
authors.forename: Asundep
authors.initials: A
authors.lastname: Ntui
authors.forename: Aditi
authors.initials: A
authors.lastname: Shendre
authors.forename: Lesleigh
authors.initials: L
authors.lastname: Lee
authors.forename: Gerald
authors.initials: G
authors.lastname: McGwin
mesh_terms: D016022:Case-Control Studies; D005260:Female; D005307:Fertilization in Vitro; D006760:Hospitalization; D006801:Humans; D016471:Ovarian Hyperstimulation Syndrome / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D010062:Ovulation Induction / Q000009:adverse effects*; D011247:Pregnancy; D011256:Pregnancy Outcome; D012107:Research Design