Table 1 Comparison of baseline parameters among the three protocols
Protocols | GnRH agonist (n = 2116) | GnRH antagonist (n = 1628) | Mild stimulation (n = 512) | P value |
|---|---|---|---|---|
Age (years) | 39.25 ± 3.05 | 38.98 ± 2.79 | 39.71 ± 3.62 | 0.581 |
Infertility years (years) | 3.61 ± 2.46 | 3.46 ± 2.52 | 3.41 ± 2.23 | 0.285 |
Sterility type (%) | ||||
 Primary infertility | 60.1(1272/2116) | 59.8(973/1628) | 58.0(297/512) | 0.683 |
 Secondary infertility | 39.9(844/2116) | 40.2(655/1628) | 42.0(215/512) |  |
BMI (kg/m2) | 25.21 ± 2.94 | 25.25 ± 3.52 | 25.81 ± 2.95 | 0.456 |
Basal FSH (IU/L) | 9.66 ± 4.92 | 10.76 ± 5.32 | 10.25 ± 5.71 | 0.253 |
Basal LH (IU/L) | 4.52 ± 2.24 | 4.84 ± 2.31 | 4.41 ± 2.25 | 0.352 |
Basal E2 (ng/L) | 46.81 ± 32.04 | 44.95 ± 36.5 | 43.49 ± 30.75 | 0.795 |
Basal P (µg/L) | 0.57 ± 0.51 | 0.49 ± 0.31 | 0.58 ± 0.42 | 0.305 |
AMH (ng/mL) | 0.67 ± 0.21 | 0.75 ± 0.31 | 0.61 ± 0.31 | 0.152 |
TSH (mlU/ml) | 2.33 ± 1.14 | 2.42 ± 1.25 | 2.61 ± 1.54 | 0.621 |
FT3 (pmol/L) | 5.41 ± 0.91 | 5.41 ± 0.65 | 5.56 ± 0.67 | 0.964 |
FT4 (pmol/L) | 11.34 ± 2.71 | 12.01 ± 1.99 | 11.56 ± 2.05 | 0.520 |
Method of fertilization | ||||
IVF | 76.9(1627/2116) | 73.9(1203/1628) | 76.4(391/512) | 0.098 |
ICSI | 23.1(489/2116) | 26.1(425/1628) | 23.6(121/512) | Â |