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Characteristics of ovarian stimulation
| Ovarian stimulation | GnRH antagonist | GnRH agonist | P value |
| Type of gonadotrophin used for stimulation | |||
| high purified urofollitropin | 24 | 17 | 0.29 |
| human menopausal gonadotrophin | 76 | 83 | |
| Total | 100 | 100 | |
| number of HMG ampoules (mean + SD) | 25.9 (± 15.1) | 31.5 (± 15.8) | < 0.01 |
| Length of stimulation (days) (mean + SD) | 8.9 (± 1.4) | 10.5 (± 1.3) | < 0.01 |
HMG: human menopausal gonadotrophin
