First trimester fetal development

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From even before you get that positive pregnancy test, through forcing down those daily prenatal vitamins and past the cravings and nausea, your little baby is blissfully developing. Come see how your baby develops during the first trimester of pregnancy in this slideshow! Take a peek at the incredible changes the embryo and fetus experiences in the first weeks after conception.

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The slides, in sequence:

2 weeks gestational age (4 weeks menstrual age)
 Actual size: approximately 1/8 inch

4 weeks gestational age (6 weeks menstrual age)
 Actual size: approximately 1/6 inch

5 weeks gestational age (7 weeks menstrual age)
 Actual size: approximately 1/3 inch

6 weeks gestational age (8 weeks menstrual age)
 Actual size: approximately 1/2 inch

9 weeks gestational age (11 weeks menstrual age)
 Actual size: approximately 1 inch

12 weeks gestational age (14 weeks menstrual age)
 Actual size: approximately 1-1/2 inches

Please note: These images are NOT to scale. All pictures are enlarged to show approximate developmental detail.

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About the slideshow: These images and information are not meant to convey precise detail, but rather the general shape and progression of the embryo/fetus as it develops. These drawings are for educational purposes only and should not be construed as medical advice. Slideshow and individual drawings are © Copyright 1999-2003 by Coincide Media, LLC. Artist: Tina Banda.