Obgyn Key

40-BV-1 Expanded blastocyst with necrotic focus in inner cell mass

38-BV-1 Full blastocyst with poor trophectoderm

39-BV-1 Expanded blastocyst with necrotic focus in inner cell mass

37-BV-1 Morula 37-AW-1 Same morula not fully expanded 37-BT-1 Early blastocyst (1)

35-BV-1 Expanded blastocyst with inner cell mass at 12 o’clock position (excluded blastomere attached to inner cell mass)

36-BV-1 Fully compacted embryo 36-AW-1 Compacted embryo showing cytoplasmic granulation 36-BT-1 Compacted embryo with extensive granulation

34-BV-1 Breathing blastocyst (hatching site indicated at 4 o’clock position)

32-BV-1 Blastocyst hatching at 4 o’clock position

33-BV-1 Early blastocyst (blastocoel out of view) 33-AW-1 Early blastocyst without re-expansion

31-BV-1 Compacting embryo 31-AW-1 Viable compacting embryo with cytoplasmic pitting