Table 2.
Comparison of the basic characteristics of the three subgroups
| Group 1A | Group 1B | Group 1C | P | |
|---|---|---|---|---|
| n | 185 | 95 | 141 | |
| Age (y) | 32.55 ± 4.62 | 31.99 ± 4.42 | 32.62 ± 4.26 | 0.516 |
| Type of infertility | ||||
| Primary infertility (%) | 46.5% (86/185) | 47.4% (45/95) | 38.3% (54/141) | 0.251 |
| Secondary infertility (%) | 53.5% (99/185) | 52.6% (50/95) | 61.7% (87/141) | 0.251 |
| Years of infertility(y) | 3.67 ± 2.69 | 3.61 ± 2.38 | 3.60 ± 2.67 | 0.969 |
| Infertility factors | ||||
| Fallopian tube factor (%) | 98.9% (183/185) | 100.0% (95/95) | 97.2% (137/141) | 0.171 |
| Male factor (%) | 9.2% (17/185) | 6.3% (6/95) | 10.6% (15/141) | 0.521 |
| Immunological factors (%) | 0.00 | 0.00 | 0.7% (1/141) | 0.561 |
| Unspecified reasons (%) | 0.00 | 0.00 | 1.4% (2/141) | 0.162 |
| Repeated implant failure (%) | 7.6% (14/185) | 7.4% (7/95) | 5.0% (7/141) | 0.614 |
| BMI (kg/m2) | 24.34 ± 3.73 | 23.49 ± 3.80 | 24.33 ± 3.87 | 0.158 |
| AMH (ng/ml) | 5.19 ± 3.05 | 5.10 ± 3.12 | 5.68 ± 3.42 | 0.281 |
| FSH (mIU/ml) | 6.87 ± 2.53 | 7.08 ± 2.77 | 6.85 ± 3.51 | 0.821 |
| LH (mIU/ml) | 6.36 ± 4.34 | 6.71 ± 3.78 | 6.17 ± 3.96 | 0.608 |
| E2 (pg/ml) | 37.02 ± 13.67 | 38.47 ± 17.72 | 35.76 ± 13.25 | 0.374 |
| P (ng/ml) | 0.37 ± 0.18 | 0.40 ± 0.17 | 0.39 ± 0.18 | 0.316 |
| T (ng/ml) | 0.48 ± 0.40 | 0.51 ± 0.30 | 0.49 ± 0.31 | 0.727 |
| Basal endometrial thickness (mm) | 5.28 ± 1.17 | 5.32 ± 1.50 | 5.52 ± 1.38 | 0.248 |
| Number of embryos transferred | 1.65 ± 0.48 | 1.66 ± 0.48 | 1.66 ± 0.47 | 0.928 |
| Number of quality embryos transferred | 0.62 ± 0.59 | 0.59 ± 0.61 | 0.55 ± 0.62 | 0.511 |
| Previous embryo transfer times | 0.63 ± 0.96 | 0.60 ± 1.12 | 0.76 ± 1.12 | 0.384 |