Table 2.
Comparison of time-lapse morphokinetic parameters of the earlier stages of embryonic development between day 5 and day 6 blastocysts
| TLM parameters | Day 5 blastocysts | Day 6 blastocysts | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | Std. err | Std. dev | CI 95% | Mean | Std. err | Std. dev | CI 95% | p value | |
| tPNf | 23.1 | 0.07 | 2.8 | 23.0–23.2 | 24.8 | 0.15 | 3.3 | 24.5–25.1 | > 0.000 |
| t2 | 25.7 | 0.13 | 5.5 | 25.5–26.0 | 27.2 | 0.16 | 3.4 | 26.9–27.6 | > 0.000 |
| t3 | 35.9 | 0.10 | 3.9 | 35.7–36.1 | 38.1 | 0.25 | 5.1 | 37.6–38.6 | > 0.000 |
| t4 | 37.5 | 0.97 | 4.1 | 37.4–37.7 | 40.5 | 0.27 | 5.7 | 40.0–41.1 | > 0.000 |
| t5 | 48.6 | 0.15 | 6.0 | 48.3–48.9 | 52.0 | 0.42 | 8.6 | 51.2–52.8 | > 0.000 |
| t6 | 51.3 | 0.14 | 5.7 | 51.1–51.6 | 56.1 | 0.38 | 7.9 | 55.4–56.9 | > 0.000 |
| t7 | 54.3 | 0.17 | 6.8 | 54.0–54.7 | 60.7 | 0.47 | 9.4 | 59.8–61.6 | > 0.000 |
| t8 | 59.4 | 0.23 | 8.9 | 58.9–59.8 | 65.7 | 0.55 | 10.9 | 64.6 | > 0.000 |
tPNf = pronuclei faded; t2, t3, t4, t5, t6, t7, t8 = time between intracytoplasmic injection and 2-, 3-, 4-, 5-, 6-, 7-, and 8-cell stages, respectively