Skip Navigation
Improving lifelong health one pregnancy at a time.
English
Español
Português
Educator Login / Register
Donate Now
Get Free Videos
Your Life Before Birth Video
Free Mobile Apps
Get Free EHD Videos
When Health Begins
The Virtual Human Embryo
Prenatal Development DVD
Image Gallery
Index
0 - 2 Weeks
2 - 4 Weeks
4 - 6 Weeks
6 - 8 Weeks
8 - 10 Weeks
10 - 12 Weeks
3 - 6 Months
6 - 9 Months
The Heart Slideshow (SS)
Eyes, Ears, Mouth & Nose SS
Hands and Arms SS
Feet and Legs SS
The Developing Brain SS
Clinical Highlights SS
Favorites SS
Facial Expressions SS
Early Events SS
Umbilical Cord & More SS
Entire Image Gallery SS
Create Custom Slideshows
Movie Theater
DVD Documentation Center
Multilingual Illustrated DVD
Educator's Corner
Classic Works
Prenatal Summary
Prenatal Timeline
Prenatal Overview
EHD Store
About EHD
Support EHD
Sections
Home
›
Image Gallery
Image Gallery
Four-Week Embryo
Image #
4 weeks
Hide Labels
|
Larger
|
Play Movie #11
|
Create your own Slideshow
From
The Biology of Prenatal Development
.
Buy Now
Label Key:
1. hindbrain
2. spinal cord
3. foregut
4. heart
5. midgut
6. midbrain
7. forebrain
8. site of future mouth (stomodeum)
9. chest wall
10. yolk sac
11. hindgut
All ages referenced to fertilization, not last menstrual period.
The 4-Week Embryo
The Folding Heart
Four-Week Embryo
Digestive Tract, 4-Week Embryo
The Body Plan Emerges
Right Upper Limb
Previous Set
Previous Picture
Next Set
Next Picture