Table 1.
Basic characteristics for cycles from 2017 through 2019.
| Characteristics | L-FET (n=502) | HRT (n=2280) | P value |
|---|---|---|---|
| Maternal age(y) | 30.95±4.56 | 31.20±4.97 | .062 |
| Paternal age(y) | 31.67±5.14 | 32.33±5.72 | .058 |
| Body mass index(kg/m2) | 23.88±2.99 | 23.97±3.18 | .548 |
| Duration of Infertility (y) | 3.26±2.83 | 3.39±2.75 | .374 |
| Type of infertility | .239 | ||
| Primary infertility | 46.6(234/502) | 43.7(997/2280) | |
| Secondary infertility | 53.4(268/502) | 56.3(1283/2280) | |
| Infertility diagnosis | .322 | ||
| Tubal factor | 32.9(165/502) | 35.4(807/2280) | |
| Male factor | 21.7(109/502) | 19.0(434/2280) | |
| Others | 45.4(228/502) | 45.6(1039/2280) | |
| Basal serum FSH level(IU/L) | 5.5±1.7 | 5.8±2.1 | .077 |
| Basal antral follicle count | 19.97±7.03 | 18.90±7.52 | .072 |
| Fertilization method | .609 | ||
| IVF | 73.5(369/502) | 74.6(1701/2280) | |
| ICSI | 26.5(133/502) | 25.4(579/2280) | |
| Endometrial thickness on day of embryo transfer (mm) | 9.72±1.83 | 8.99±2.10 | <.001 |
| Development stage of blastocysts | .323 | ||
| D5 | 63.9(321/502) | 61.1(1404/2280) | |
| D6 | 36.1(181/502) | 38.4(876/2280) |
Data are presented as mean ± SD for continuous variable and % (n/N) for categorical variable. Student t test was used for continuous variables, and the Pearsonχ2 test was used for categorical variables with Fisher’s exact test when necessary.