Table 2.
Ovarian stimulation characteristics and embryological outcomes of ovarian stimulation in the two groups.
| Characteristic | Late stimulation protocol group (n = 70) | Short GnRH-a protocol group (n = 65) | P-value |
|---|---|---|---|
| Duration of human menopausal gonadotropin (days), mean (SD) | 10.93 (1.65) | 8.57 (2.06) | <0.001 |
| Dose of human menopausal gonadotropin (IU), mean (SD) | 2118.21 (351.19) | 1652.31 (562.18) | <0.001 |
| No. of follicles with diameter >14 mm on trigger day, mean (SD) | 11.71 (6.19) | 7.91 (3.39) | 0.184 |
| No. of follicles with diameter >10 mm on oocyte retrieval day, mean (SD) | 15.34 (8.36) | 14.08 (7.29) | 0.410 |
| No. of oocytes retrieved, mean (SD) | 11.13 (5.93) | 10.62 (6.32) | 0.521 |
| No. of mature oocytes, mean (SD) | 10.00 (5.60) | 8.51 (5.03) | 0.110 |
| No. of fertilized oocytes (2PN), mean (SD) | 8.04 (4.42) | 7.32 (4.62) | 0.250 |
| No. of cleaved embryos, mean (SD) | 7.97 (4.40) | 6.95 (4.55) | 0.153 |
| No. of good-quality Day 3 embryos, mean (SD) | 3.61 (2.31) | 2.91 (2.29) | 0.065 |
| No. of all good-quality embryos (Day 3 embryos and blastocysts), mean (SD) | 4.47 (2.55) | 3.89 (2.98) | 0.118 |
| Good-quality embryo rate per oocyte retrieved, % (no. of good-quality embryos/no. of oocytes retrieved) | 40.18 (313/779) | 36.67 (253/690) | 0.167 |
GnRH-a, Gonadotropin-releasing hormone agonist, 2PN, two pronuclei.