Developmental timeline
TS1 (fertilized egg) → P56 (adult) · click a stage to load samples
TS1
E0.5
1-cell
TS2
E1
2-cell
TS3
E2
4-16 cell
TS4
E3
morula → blastocyst
TS5
E4
late blastocyst
TS6
E4.5
attaching blastocyst
1TS7
E5
egg cylinder
1TS8
E6
prestreak
2TS9
E6.5
streak
3TS10
E7
amnion
4TS11
E7.5
neural plate
12TS12
E8
neural folds
3TS13
E8.5
5-8 somites
2TS14
E9
9-12 somites
18TS15
E9.5
13-20 somites
6TS16
E10
forelimb buds
8TS17
E10.5
hindlimb buds
7TS18
E11
handplate
15TS19
E11.5
hindlimb handplate
9TS20
E12
digital rays
7TS21
E13.5
finger separation
9TS22
E14
eyelid formation
21TS23
E15
eyelids closing
24TS24
E15.5
ear pinna
5TS25
E16.5
long whiskers
2TS26
E17.5
body hair
1TS27
E18.5
pre-birth
P7
P7
postnatal day 7
P56
P56
adult (8 weeks)
E0
E2
E4
E6
E8
E10
E12
E14
E16
E18
Birth
E0E5E10E15BirthP7P56
TS10
E7· Amnion formsThree germ layers established. Extra-embryonic membranes (amnion, allantois) emerge.
2samples
1/2anatomy delineated
histology · 2Histology — embryo physically embedded and microtomed into 1–7 µm sections, stained (Nissl / H&E), imaged, and reassembled into a 3D volume. High in-plane resolution, anisotropic voxels. MERFISH · 1MERFISH — combinatorial single-molecule FISH, ~100s of targeted genes at subcellular resolution.
Transcriptomics data · 1
Stage-matched · not registered to atlas anatomy 3D reference models
Histology plates · 31
Kaufman atlas, EMAPA-annotated · scroll → 
Transverse3 ann Plate 04o
TS10
Transverse3 ann Plate 04p
TS10
Transverse6 ann Plate 03a
TS9 · TS10
Transverse3 ann Plate 03b
TS9 · TS10
Transverse8 ann Plate 03c
TS9 · TS10
Transverse3 ann Plate 03d
TS9 · TS10
Transverse2 ann Plate 03e
TS9 · TS10
Transverse4 ann Plate 03f
TS9 · TS10
Transverse2 ann Plate 03g
TS9 · TS10
Transverse5 ann Plate 03h
TS9 · TS10
Transverse6 ann Plate 03i
TS9 · TS10
Transverse1 ann Plate 03j
TS9 · TS10
Transverse4 ann Plate 03k
TS9 · TS10
Transverse1 ann Plate 03l
TS9 · TS10
Transverse4 ann Plate 03m
TS9 · TS10
Transverse1 ann Plate 03n
TS9 · TS10
Transverse3 ann Plate 03o
TS9 · TS10
Transverse1 ann Plate 04a
TS10
Transverse2 ann Plate 04b
TS10
Transverse4 ann Plate 04c
TS10
Transverse4 ann Plate 04d
TS10
Transverse3 ann Plate 04e
TS10
Transverse4 ann Plate 04f
TS10
Transverse3 ann Plate 04g
TS10
Transverse4 ann Plate 04h
TS10
Transverse3 ann Plate 04i
TS10
Transverse3 ann Plate 04j
TS10
Transverse4 ann Plate 04k
TS10
Transverse1 ann Plate 04l
TS10
Transverse3 ann Plate 04m
TS10
Transverse2 ann Plate 04n
TS10
Knowledge graph · TS10
EMAPA / CL-anchored · drag to rotate, scroll to zoom scRNA-seq · Literature · Predictions — coming soon
Previous
TS9E6.5
Streak — gastrulation begins
About Theiler staging
Karl Theiler's staging system (1972) partitions prenatal development into 28 morphologically distinct steps. Virtual Embryo aligns all imagery, anatomy, and future spatial transcriptomics data to this axis.
Next
E7.5TS11
Neural plate
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