Table 6.
The clinical pregnancy rate according to treatment protocol
| Treatment protocol | Ovarian stimulation cycle | ||||||
|---|---|---|---|---|---|---|---|
|
|
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| Natural cycle | Ovarian stimulation cycle | LE (a) | CC (b) | LE + HMG (c) | CC + HMG (d) | HMG (e) | |
| Pregnant group, n (%) | 18 (25) | 250 (22.08) | 9 (21.43) | 9 (12.85) | 142 (25.27) | 79 (18.81) | 11 (28.95) |
| Non-pregnant group, n (%) | 54 (75) | 882 (77.92) | 33 (78.57) | 61 (87.15) | 420 (74.73) | 341 (81.19) | 27 (71.05) |
| χ 2 | 0.332 | 10.44 | |||||
| P | 0.56 | 0.034 | |||||
Pairwise comparison (χ2 [P]). P<0.05=b: c 5.272 (0.022), b: e 4.226 (0.04), c: d 5.747 (0.017). P>0.05=a: e 0.602 (0.438), c: e 0.254 (0.614), a: b 1.43 (0.232), d: e 2.268 (0.132), b: d 1.443 (0.23), a: c 0.307 (0.579), a: d 0.170 (0.68). HMG=Human menopausal gonadotropin, LE=Letrozole, CC=Clomiphene citrate