Distribution of descendants of first and second dividing 2-cell blastomeres when second blastomere contributes more or even number of cells to the blastocyst*
| Name (number of blastocysts) . | Total cells . | Total early . | Total embryonic . | % Embryonic early . | Early in BZ . | Early crossing BZ to abembryonic . | Total late . | Total abembryonic . | % Abembryonic late . | Late in BZ . | Late crossing BZ to embryonic . | Total BZ . | %BZ early . | %BZ late . | Tilt . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1n (12) | 31.6 | 14.5 | 11.8 | 43 | 4.0 | 5.4 | 17.1 | 10.4 | 49 | 5.3 | 6.8 | 9.3 | 44 | 56 | 45.6 |
| 2n CD (11) | 38.3 | 18.5 | 15.4 | 56 | 5.3 | 4.7 | 19.7 | 11.6 | 60 | 6.0 | 6.8 | 11.3 | 46 | 54 | 48.4 |
| 2n PB (11) | 34.4 | 15.4 | 14.7 | 36 | 5.1 | 5.1 | 19.0 | 9.5 | 45 | 5.1 | 9.5 | 10.2 | 50 | 50 | 30.6 |
| No SEP (13) | 31.5 | 14.6 | 13.4 | 51 | 3.5 | 4.3 | 16.8 | 9.2 | 54 | 5.4 | 6.5 | 8.8 | 39 | 61 | 55.4 |
| Con SEP (7) | 27.4 | 12.3 | 11.7 | 42 | 3.1 | 4.6 | 15.1 | 7.9 | 45 | 4.7 | 7.1 | 7.9 | 40 | 60 | 45.0 |
| Name (number of blastocysts) . | Total cells . | Total early . | Total embryonic . | % Embryonic early . | Early in BZ . | Early crossing BZ to abembryonic . | Total late . | Total abembryonic . | % Abembryonic late . | Late in BZ . | Late crossing BZ to embryonic . | Total BZ . | %BZ early . | %BZ late . | Tilt . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1n (12) | 31.6 | 14.5 | 11.8 | 43 | 4.0 | 5.4 | 17.1 | 10.4 | 49 | 5.3 | 6.8 | 9.3 | 44 | 56 | 45.6 |
| 2n CD (11) | 38.3 | 18.5 | 15.4 | 56 | 5.3 | 4.7 | 19.7 | 11.6 | 60 | 6.0 | 6.8 | 11.3 | 46 | 54 | 48.4 |
| 2n PB (11) | 34.4 | 15.4 | 14.7 | 36 | 5.1 | 5.1 | 19.0 | 9.5 | 45 | 5.1 | 9.5 | 10.2 | 50 | 50 | 30.6 |
| No SEP (13) | 31.5 | 14.6 | 13.4 | 51 | 3.5 | 4.3 | 16.8 | 9.2 | 54 | 5.4 | 6.5 | 8.8 | 39 | 61 | 55.4 |
| Con SEP (7) | 27.4 | 12.3 | 11.7 | 42 | 3.1 | 4.6 | 15.1 | 7.9 | 45 | 4.7 | 7.1 | 7.9 | 40 | 60 | 45.0 |
Mean values are indicated; for full dataset see Tables 1B, 2B, 3B, 4B and 5B presented as Supplemental data. Counts of blastocyst cells were performed as described forTable 1.