Table 4.
Ovarian stimulation characteristics in suboptimal responders (group B)
| IVF | ICSI | p value | |
|---|---|---|---|
| n = 327 (13%) | n = 2187 (87%) | ||
| Initial dose (IU) | |||
| Median (IQR) | 225 (150–300) | 225 (200–300) | < 0.001 |
| Stimulation days | |||
| Median (IQR) | 10 (9–11) | 10 (9–11) | 0.06 |
| Number of oocytes | |||
| Median IQR | 6 (5–8) | 6 (5–8) | 0.4 |
| Fertilization rates (%) | |||
| Median IQR | 66.6 (50–80) | 62.5 (50–77) | 0.4 |
| Embryo utilization rates (%) | |||
| Median IQR | 66.6 (50–100) | 66.6 (40–100) | 0.13 |
| Day of embryo transfer in the fresh cycle, n (%)~ | |||
| Day 2 | 22 (7.6) | 87 (4.5) | 0.04 |
| Days 3 and 4 | 225 (77.6) | 1499 (77.3) | |
| Days 5 and 6 | 43 (14.8) | 353(18.2) | |
| Number of embryos transferred in the fresh cycle~ | |||
| Median (IQR) | 2 (1–2) | 2 (1–2) | < 0.001 |
| Fresh LBR | |||
| n (%) | 91 (27.8) | 622 (28.4) | 0.16 |
| Cumulative LBR | |||
| n (%) | 108 (33) | 768 (35.1) | 0.4 |
Two-sample Mann–Whitney test or Person χ2 test or Fisher’s exact test (unadjusted)
~For patients having an embryo transfer (n = 2229)