Table I.
Morphologic parameters according to live birth outcome.
| Live birth | |||
|---|---|---|---|
| Parameter | No (n = 133) | Yes (n = 99) | P-value a |
| Cleavage stagec: | |||
| 2-cell | 1 (0.7) | 0 (0) | 1.000 |
| 4-cell | 125 (94.0) | 94 (95.0) | |
| 5-cell | 5 (3.8) | 3 (3.0) | |
| 6-cell | 2 (1.5) | 2 (2.0) | |
| 1st Cleavage | |||
| ≤26 h | 100 (75.2) | 81 (81.8) | 0.228 |
| >26 h | 33 (24.8) | 18 (18.2) | |
| Embryo fragmentationc: | |||
| [0–10]% | 119 (89.5) | 82 (82.8) | 0.318 |
| [10–20]% | 12 (9.0) | 14 (14.1) | |
| [20–50]% | 2 (1.5) | 3 (3.0) | |
| Cleavage typec: | |||
| regular | 124 (93.2) | 94 (94.9) | 0.587 |
| irregular | 9 (6.8) | 5 (5.1) | |
| ‘TOP’ embryob | 118 (88.7) | 88 (88.9) | 0.968 |
For categorical variables, n (%) is presented. For continuous variables, mean (± SD) and range are presented. IQ: interquartile.
a
aChi2 or Fisher’s exact tests were used for dichotomous variables.
b
b‘TOP’ embryo is fertilized at Day 1 without MNB2cell with regular 4- to 5-cell embryos at Day 2 with <20% fragmentation.
c
cAt 43H+/-1H.