Slideshow: Fetal Development Month by Month
Your Pregnancy Stage by Stage
Conception
Development at 4 Weeks
Development at 8 Weeks
Development at 12 Weeks
Development at 16 Weeks
Development at 20 Weeks
Time for an Ultrasound
Development at 24 Weeks
Development at 28 Weeks
Development at 32 Weeks
Development at 36 Weeks
Birth!
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SOURCES:
American Academy of Family Physicians.
Cleveland Clinic: "Fetal Development."
Mayo Clinic: "Fetal development: The 1st trimester," "Blastocyst."
Merck Manual: "Stages of Development of the Fetus."
University of Rochester Medical Center: "Anatomy of the Male and Female Pelvis."American College of Obstetricians and Gynecologists: "Definition of Term Pregnancy," "How Your Baby Grows During Pregnancy."
KidsHealth.org: "Pregnancy Calendar."
March of Dimes: "Prenatal Care – Ultrasound," "What Is Full-Term?"
U.S. Department of Health and Human Services Office of Women’s Health: "Pregnancy: Breast Changes."