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    Illustration copyright 2000 by Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com

    Fertilization occurs when a sperm cell penetrates the egg, usually in one of the fallopian tubes.

    ByHealthwise Staff
    Primary Medical Reviewer Sarah Marshall, MD - Family Medicine
    Specialist Medical Reviewer Kirtly Jones, MD - Obstetrics and Gynecology

    Current as ofMay 22, 2015

    Current as of: May 22, 2015

    Author: Healthwise Staff

    Medical Review: Sarah Marshall, MD - Family Medicine & Kirtly Jones, MD - Obstetrics and Gynecology

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