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	Institution: STANFORD Univ Med Center  | My Account | E-mail Alerts | Access Rights | Sign In Vol. 9 No. 7, July 2000   Archives  •  Online Features  Article Links  • Return to Article Downloading the PowerPoint slide may take up to 30 seconds. If the slide opens in your browser, select File -> Save As to save it. Copyright restrictions may apply. Please see our Conditions of Use. Figure 1. Observed (open circle) and expected (closed circle) numbers of pregnancies by timing of coitus in relation to predicted ovulation, by treatment group. Reprinted with permission from Lancet (1998;352:428-433). Copyright 1998, the Lancet Publishing Group, London, England, a division of Elsevier Science Ltd. HOME | CURRENT ISSUE | PAST ISSUES | TOPIC COLLECTIONS | CME | PHYSICIAN JOBS | HELP CONDITIONS OF USE | PRIVACY POLICY | CONTACT US | SITE MAP   © 2009 American Medical Association. All Rights Reserved.