Template talk:Mouse Somitogenesis table

From Embryology
Mouse Somitogenesis
Theiler Stages
Age (E days)
Somite Number
12 8 1-7
  • Equivalent Witschi Stage in rat = 14-15
  • Equivalent Carnegie Stage in humans = 9

Theiler Stage 13

  • Embryonic age = 8.5 dpc (range 8-9.25 dpc)
  • 8-12 somite pairs
  • Equivalent Witschi Stage in rat = 15
  • Equivalent Carnegie Stage in humans = 10

Theiler Stage 14

  • Embryonic age = 9 dpc (range 8.5-9.75 dpc)
  • 13-20 somite pairs
  • Equivalent Witschi Stage in rat = 16
  • Equivalent Carnegie Stage in humans = 11

Theiler Stage 15

  • Embryonic age = 9.5 dpc (range 9-10.25 dpc)
  • 21-29 somite pairs
  • Equivalent Witschi Stage in rat = 17-19
  • Equivalent Carnegie Stage in humans = 12

Theiler Stage 16

  • Embryonic age = 10 dpc (range 9.5-10.75 dpc)
  • 30-34 somite pairs
  • Equivalent Witschi Stage in rat = 20-21
  • Equivalent Carnegie Stage in humans = 13-15

Theiler Stage 17

  • Embryonic age = 10.5 dpc (range 10-11.25 dpc)
  • 35-39 somite pairs
  • Equivalent Witschi Stage in rat = 24-25
  • Equivalent Carnegie Stage in humans = 13-15

Theiler Stage 18

  • Embryonic age = 11 dpc (range 10.5-11.25 dpc)
  • 40-44 somite pairs
  • Equivalent Witschi Stage in rat = 25-26
  • Equivalent Carnegie Stage in humans = 13-15

Theiler Stage 19

  • Embryonic age = 11.5 dpc (range 11-12.25 dpc)
  • 45-47 somite pairs
  • Equivalent Witschi Stage in rat = 26-27
  • Equivalent Carnegie Stage in humans = 16

Theiler Stage 20

  • Embryonic age = 12 dpc (range 11.5-13 dpc)
  • 48-51 somite pairs
  • Equivalent Witschi Stage in rat = 28
  • Equivalent Carnegie Stage in humans = 17

Theiler Stage 21

  • Embryonic age = 13 dpc (range 12.5-14)
  • 52-55 somite pairs
  • Equivalent Witschi Stage in rat = 29-30
  • Equivalent Carnegie Stage in humans = 18-19


Theiler Stage 22

Mouse CT E14.5
  • Embryonic age = 14 dpc (range 13.5-15 dpc)
  • 56-60 somite pairs
  • Equivalent Witschi Stage in rat = 31
  • Equivalent Carnegie Stage in humans = 20-23


Theiler Stage 23

Mouse E15 CT

Toes separate

  • The 'toes' separate and are clearly divergent, not becoming parallel until later.
  • Hair follicles are present in the cephalic region but not at the periphery of the vibrissae.
  • The pinna covers more than half of the external auditory meatus and the eyelids are still open.
  • Absent: nail primordia, 'fingers' 2-5 parallel.
  • Embryonic age = 15 dpc
  • >60 somite pairs
  • Equivalent Witschi Stage in rat = 32
  • Human fetal period.