| tPB |
Appearance of second polar body |
| tPNa |
Appearance of the first pronuclei |
| tPN |
Appearance of both pronuclei |
| tPNf |
Time when both pronuclei had faded |
| t2 |
Time to 2-cell embryo |
| t3 |
Time to 3-cell embryo |
| t4 |
Time to 4-cell embryo |
| t5 |
Time to 5-cell embryo |
| t6 |
Time to 6-cell embryo |
| t7 |
Time to 7-cell embryo |
| t8 |
Time to 8-cell embryo |
| t9 |
Time to 9-cell embryo |
| tSC |
Time from insemination to initiation of compaction |
| tM |
Time from insemination to formation of a morula, completion of compaction process |
| tSB |
Time from insemination to star blastulation |
| tB |
Time form insemination to formation of a full blastocyst |
| tEB |
Time to expanded blastocyst |
| tH |
Time to hatching blastocyst, the trophectoderm herniation through the zona pellucida |
| tHatched |
Time to hatched blastocyst, the embryo has full escaped the zona pellucida |
|
Duration variables |
Description |
| cc1 |
Time of first cell cycle (t2- tPB) |
| cc2 |
Time of second cell cycle (t3-t2), from 2 to 3 cells |
| cc3 |
Time of third cell cycle (t5-t3), from 3 to 5 cells |
| s2 |
Time of synchrony of the second cycle (t4-t3), from 2 to t4 cells |
| s3 |
Time of synchrony of the third cell cycle (t8-t5), from t5 to 8 cells. |