Table 3 Ovarian stimulation characteristics in first cycles
|  | BOTs (n = 61) | Control (n = 181) | T (χ2) | P |
|---|---|---|---|---|
Duration of stimulation (day) | 6.66 ± 0.499 | 6.75 ± 0.304 | 0.150 | 0.881 |
Total dose of injected gonadotropins (IU) | 1281.35 ± 129.082 | 1207.76 ± 66.469 | -0.538 | 0.591 |
Number of retrieved oocytes | 6.31 ± 0.740 | 6.50 ± 0.534 | 0.183 | 0.855 |
Number of 2PN embryos | 5.89 ± 0.719 | 6.06 ± 0.510 | 0.180 | 0.857 |
Number of transferable embryos | 3.70 ± 0.534 | 3.99 ± 0.362 | 0.416 | 0.678 |
Number of good quality embryos | 3.05 ± 0.429 | 3.27 ± 0.318 | 0.359 | 0.720 |
Percentage of 2PN embryos per oocyte retrieved (%) | 52.650 ± 4.107 | 60.60 ± 2.587 | 1.599 | 0.111 |
Percentage of transferable embryos per oocyte retrieved (%) | 44.111 ± 3.631 | 48.620 ± 2.563 | 0.939 | 0.349 |
Percentage of good quality embryos per oocyte retrieved (%) | 33.787 ± 3.641 | 39.686 ± 2.624 | 1.317 | 0.190 |
Live birth rate of first started cycle (%) | 17/61(27.869) | 69/181(38.122) | 2.094 | 0.148 |