title: A critical issue in the summary measures for ART. What is the experimental unit--the cycle or the patient?
authors.forename: Richard P
authors.initials: RP
authors.lastname: Dickey
mesh_terms: D005260:Female; D006801:Humans; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011315:Preventive Medicine; D012099:Reproductive Techniques / Q000009:adverse effects*