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Cycle characteristics of study groups
| Variables | Hatching (n = 85) | Control (n = 85) | P-value | |
| Embryo transferred | ||||
| Fresh | 40 (47.1) | 28 (32.9) | ||
| Freeze | 45 (52.9) | 57 (67.1) | 0.060 | |
| Type of infertility | ||||
| Primary | 54 (63.5) | 63 (74.1) | ||
| Secondary | 31 (36.5) | 22 (25.9) | 0.136 | |
| Number of embryos | ||||
| 1 | 23 (27.1) | 17 (20) | ||
| 2 | 62 (72.9) | 68 (80) | 0.278 | |
| Data presented as n (%), Chi-square test | ||||
