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The Biology
of Prenatal
Development
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The Virtual Human Embryo

Welcome to The Virtual Human Embryo (VHE), a 14,250-page, illustrated atlas of human embryology, which presents all 23 Carnegie Stages of development during the 8-week embryonic period.

This $3.2 million, 11-year initiative engaged a team led by Dr. Raymond F. Gasser—one of the leading embryologists of the last half century. His team created thousands of restored, digitized, and labeled serial sections from the world's largest collection of preserved human embryos. They used these serial sections to create animations, fly-throughs, and 3-D reconstructions.

The VHE is now available to researchers, educators, and students everywhere. Read More...

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Click any embryo below to go to that stage.


VHE Stats and Quick Links

Carnegie
Stage
Movies
Figures
Serial
Sections
Unique
Terms
New
Terms
Total
Labels
2 10 78 6 12 12 26
3-1 6 79 12 22 19 59
3-2 6 16 14 11 3 73
4 7 27 55 23 18 261
5a-1 8 14 78 37 25 482
5a-2 9 11 42 30 7 205
5b 8 16 98 41 18 461
5c 9 30 139 52 21 627
6 10 32 50 75 57 262
7 8 43 100 90 51 531
8 5 0 110 66 29 486
9 7 13 152 165 69 1,033
10 2 17 170 185 185 1,193
11 3 40 137 265 191 1,226
12 3 10 146 341 222 1,634
13 4 20 247 361 231 2,890
14 14 15 108 506 366 2,177
15 6 5 138 482 217 1,905
16 17 10 274 854 480 4,546
17 13 9 187 724 261 2,491
18 15 8 147 834 367 2,321
19 12 0 131 860 278 2,878
20 24 2 199 926 288 3,468
21 10 3 195 845 179 3,340
22 11 0 203 1,197 398 4,094
23 22 37 209 1,309 428 4,442
Total 252 587 3,347 4,420 4,420 43,111

See the Living Embryo in Action at ehd.org

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Top Search Terms

Full Index...
notochord 501 sympathetic trunk 285
aorta 490 sulcus limitans 276
surface ectoderm 351 pericardial cavity 266
subarachnoid space 332 rhombencoel (fourth ventricle) 265
dorsal aorta 327 peritoneal cavity 251