Main content

    Health Information

    Normal Pregnancy: First Trimester

    Normal Pregnancy: First Trimester

    Fetal development in the first trimester

    The first trimester lasts from week 1 through week 12.

    By Healthwise Staff
    Sarah Marshall, MD - Family Medicine
    Kirtly Jones, MD - Obstetrics and Gynecology
    Last Revised July 23, 2012

    Last Revised: July 23, 2012

    Author: Healthwise Staff

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

    This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

    1995-2014 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.