Virtual EmbryoVirtual Embryo
Virtual Embryo Atlas
HumanMouse

Developmental timeline

TS1 (fertilized egg) → P56 (adult) · click a stage to load samples

View
TimelineModality
TS1
TS1
E0.5
1-cell
TS2
TS2
E1
2-cell
TS3
TS3
E2
4-16 cell
TS4
TS4
E3
morula → blastocyst
TS5
TS5
E4
late blastocyst
TS6
TS6
E4.5
attaching blastocyst
TS71
TS7
E5
egg cylinder
TS81
TS8
E6
prestreak
TS92
TS9
E6.5
streak
TS103
TS10
E7
amnion
TS115
TS11
E7.5
neural plate
TS1210
TS12
E8
neural folds
TS134
TS13
E8.5
5-8 somites
TS143
TS14
E9
9-12 somites
TS1516
TS15
E9.5
13-20 somites
TS166
TS16
E10
forelimb buds
TS178
TS17
E10.5
hindlimb buds
TS187
TS18
E11
handplate
TS1915
TS19
E11.5
hindlimb handplate
TS209
TS20
E12
digital rays
TS217
TS21
E13.5
finger separation
TS229
TS22
E14
eyelid formation
TS2321
TS23
E15
eyelids closing
TS2424
TS24
E15.5
ear pinna
TS255
TS25
E16.5
long whiskers
TS262
TS26
E17.5
body hair
TS271
TS27
E18.5
pre-birth
P7
P7
P7
postnatal day 7
P56
P56
P56
adult (8 weeks)
E0
E2
E4
E6
E8
E10
E12
E14
E16
E18
Birth
E0E5E10E15BirthP7P56

TS4

E3· Morula → early blastocyst

Cavitation: the blastocoel forms; inner cell mass and trophectoderm segregate.

0samples
Knowledge graph · TS4
EMAPA / CL-anchored · drag to rotate, scroll to zoom
3D reference models
No reconstructed 3D models converted for this stage yet. Kaufman plate histology may still be available.
scRNA-seq · Literature · Predictions — coming soon
←TS3
Previous
TS3E2
4–16 cell, morula
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
E4TS5
Late blastocyst
TS5→