9-BV-1 Expanded blastocyst of optimal quality 9-AW-1 Slightly granulated blastocyst 9-BT-1 Re-expanded blastocyst with hatching site close to the inner cell mass

11-BV-1 Hatching blastocyst with hatching site out of focus (11 o’clock position) 11-AW-1a Starting re-expansion of collapsed blastocyst

6-BV-1 IVF-blastocyst with beginning expansion 6-AW-1 Same blastocyst without signs of re-expansion but excluded fragments

8-BV-1 Expanded blastocyst with breathing 8-AW-1 Partially collapsed blastocyst with granulated cytoplasm 8-BT-1 Re-expanded blastocyst with excluded fragments

7-BV-1 Full blastocyst with dark ZP 7-AW-1 Viable blastocyst

5-BV-1 Expanded blastocyst 5-AW-1 Immediate re-expansion after warming 5-BT-1 Hatching blastocyst (10 o’clock position) with necrotic cell at the 3 o’clock position

4-BV-1 Early blastocyst 4-AW-1 Early blastocyst