Table 1.
Baseline characteristics between the LUF group and ovulation group.
| LUF | Ovulation | P-value | |
|---|---|---|---|
| Cycles | 177 | 354 | |
| Female age (y) | 31.42 ± 3.59 | 31.78 ± 3.74 | 0.30 |
| BMI (kg/m2) | 21.29 ± 2.65 | 20.91 ± 2.45 | 0.10 |
| Course of infertility (y) | 4.09 ± 2.90 | 4.05 ± 2.80 | 0.86 |
| Primary infertility, n (%) | 95 (53.67) | 186 (52.54) | 0.81 |
| Parity ≥1, n (%) | 49 (27.68) | 123 (34.75) | 0.10 |
| Cause of infertility a , n (%) | 0.12 | ||
| Fallopian tube or pelvic factors | 85 (49.42) | 143 (41.81) | |
| Male factors | 35 (20.35) | 103 (30.12) | |
| Mix factors (both male and female) | 42 (24.42) | 79 (23.10) | |
| Unexplained infertility | 10 (5.81) | 17 (4.97) | |
| Basal FSH (IU/L) | 5.61 ± 1.48 | 5.60 ± 1.38 | 0.94 |
| Basal PRL (ng/ml) | 16.85 ± 8.44 | 17.46 ± 9.77 | 0.48 |
| Times of pregnancy loss, n (%) | 0.78 | ||
| 0 | 154 (87.01) | 314 (88.70) | |
| 1 | 18 (10.17) | 33 (9.32) | |
| 2 | 5 (2.82) | 7 (2.98) | |
| ICSI fertilization, n (%) b | 71 (40.11) | 155 (43.79) | 0.42 |
| COS cycle | |||
| Number of oocytes retrieved | 16.54 ± 7.22 | 17.30 ± 7.63 | 0.27 |
| Number of mature oocytes | 14.71 ± 6.19 | 15.06 ± 6.52 | 0.55 |
| Number of available embryos | 6.51 ± 3.03 | 6.94 ± 3.27 | 0.14 |
| Number of good embryos | 5.33 ± 3.29 | 5.52 ± 3.51 | 0.54 |
| Number of frozen embryos | 5.38 ± 3.40 | 5.81 ± 3.73 | 0.19 |
| PGT cycles (%) | 23 (12.99) | 50 (14.12) | 0.72 |
| PGT-A cycles, n (%) | 8 (4.52) | 20 (5.65) | 0.58 |
| Number of FET attempts, n (%) | 0.12 | ||
| 1 | 130 (73.45) | 274 (77.40) | |
| 2 | 37 (20.90) | 51 (14.41) | |
| >2 | 10 (5.65) | 29 (8.19) | |
| Endometrium thickness (mm) | 10.46 ± 2.07 | 10.53 ± 2.01 | 0.69 |
| Number of embryos transferred | 1.51 ± 0.50 | 1.43 ± 0.50 | 0.09* |
| Period of embryos thawed (months) | 5 (1, 80) | 4 (1, 83) | 0.20* |
| Embryo quality | 0.65 | ||
| Good, n (%) | 125 (70.62) | 262 (74.01) | |
| Moderate, n (%) | 25 (14.13) | 41 (11.58) | |
| Poor, n (%) | 27 (15.25) | 51 (14.41) |
a
Five patients in the LUF group and 12 patients in the ovulation group underwent PGT due to genetic factors and were fertile.
b
Two patients in the ovulation group had two blastocysts transferred from a half-ICSI protocol. *Mann–Whitney U test.