Characteristic | GnRH agonist-HRT | HRT | NC | P value |
---|---|---|---|---|
(n = 290) | (n = 194) | (n = 65) | ||
female age(y) | 38.7 ± 2.19 | 39.14 ± 2.2 | 38.74 ± 1.96 | 0.083 |
BMI (kg/m2) | 22.37 ± 2.74 | 22.66 ± 2.77 | 22.13 ± 2.48 | 0.313 |
ET cycle number | 3.43 ± 0.75 | 3.42 ± 0.71 | 3.52 ± 0.9 | 0.609 |
Interval between fresh and frozen transfer(m) | 6.41 ± 5.92 | 6.11 ± 6.57 | 5.75 ± 4.65 | 0.688 |
bFSH (IU/L) | 7.95 ± 2.97 | 8.28 ± 2.96 | 8.07 ± 3.17 | 0.509 |
Infertility duration in years (y) | 5.48 ± 4.10 | 5.27 ± 4.28 | 5.78 ± 3.98 | 0.670 |
Infertility type (n, %) | 0.272 | |||
Primary infertility | 75 (25.86) | 46 (23.71) | 22 (33.85) | |
Secondary infertility | 215 (74.14) | 148 (76.29) | 43 (66.15) | |
Fertilization type (n, %) | 0.028 * | |||
IVF | 208 (71.70) | 135 (69.60) | 49 (75.40) | |
ICSI | 78 (26.90) | 56 (28.90) | 11 (16.90) | |
IVF + ICSI | 4 (1.40) | 3 (1.50) | 5 (7.70) | |
Progesterone on the administration day (ng/ml) | 0.38 ± 0.29 | 0.54 ± 0.47 | 0.000 * | |
Endometrial thickness on the day of transfer (mm) | 10.34 ± 1.68 | 9.79 ± 1.54 | 10.78 ± 2.25 | 0.000 * |
No. of transferred embryos (n, %) | 0.055 | |||
1 | 84 (28.97) | 70 (36.08) | 29 (44.62) | |
2 | 193 (66.55) | 116 (59.79) | 31 (47.69) | |
3 | 13 (4.48) | 8 (4.12) | 5 (7.69) | |
Type of embryo transferred(n, %) | 0.074 | |||
Cleavage stage embryo | 130 (44.83) | 107 (55.15) | 34 (52.31) | |
Blastocyst | 160 (55.17) | 87 (44.85) | 31 (47.69) |