Table 6. Score Variation between 5 different blastocyst classification systems
  Gardner Veeck Istanbul Consensus ASEBIR Sjoblom
Expansion - - - - Compacting
1 Morula cavitation 1 From initiating expansion to hatched Caviting
2 1 or 2 2 A: 4AA (Garder), 3AA (Veeck), 311 (Istanbul consensus), AA - BA - CA (ASEBIR)
B: 3AA (Garder), 1BB-2BB (Veeck), 322 (Istanbul consensus), AB - BB - CB (ASEBIR)
C: (ICM and TE)
CC (Garder), CC - DC - CD (Veeck), 333 (Istanbul consensus), AC-AD (ASEBIR)
3 3 2 or 3
4 3 3
5 4 4
6 5 4
- 6 - -
ICM A A 1 A
B B 2 B
C C 3 C (Indifferent)
- D - D
TE A A 1 A
B B 2 B
C C 3 C
- D - D