Table 2.
Overall clinical outcomes of blastocyst diameters divided by vitrification day among groups
| 180 μm | 190 μm | 200 μm | 210 μm | > 220 μm | Hatched | *P value | ||
|---|---|---|---|---|---|---|---|---|
| CPRs | Day 5 group (%, n) |
57.6 a (1586/2755) |
65.6 a (1001/1526) |
69.8 a (543/778) |
75.5 a (243/322) |
72.9 a (196/269) |
63.0 a (46/73) |
< 0.05 |
| Day 6 group (%, n) |
34.9 b (857/2457) |
42.6 b (849/1994) |
48.3 b (798/1652) |
49.9 b (437/876) |
57.4 b (529/922) |
58.5 b (314/537) |
< 0.05 | |
| Day 7 group (%, n) |
11.8 c (20/169) |
21.6 c (35/162) |
21.6 c (74/343) |
20.8 c (31/149) |
28.8 c (49/170) |
31.2 c (38/122) |
< 0.05 | |
| LBRs | Day 5 group (%, n) |
45.7 a (1258/2755) |
52.0 a (794/1526) |
55.7 a (433/778) |
57.8 a (186/322) |
57.6 a (155/269) |
48.0 a (35/73) |
< 0.05 |
| Day 6 group (%, n) |
24.1 b (593/2457) |
30.8 b (614/1994)) |
34.8 b (574/1652)) |
39.0 b (342/876) |
42.2 b (389/922) |
43.0 b (231/537) |
< 0.05 | |
| Day 7 group (%, n) |
7.7 c (13/169) |
14.2 c (23/162) |
13.4 c (46/343) |
16.1 c (24/149) |
20.0 c (34/170) |
23.0 c (28/122) |
< 0.05 | |
*All clinical outcomes that include clinical pregnancy and live birth rates were significant trend, as demonstrated by the Cochran-Armitage trend test (P < 0.05)
Different characters indicated significant difference in CPRs and LBRs among the day 5 group, day 6 group, and day 7 group on each column (P < 0.0167)
CPRs clinical pregnancy rates, LBRs live birth rates