Table 2 ART characteristics of the study groups
A blood group n = 486 | B blood group n = 673 | AB blood group n = 136 | O blood group n = 784 | Total n = 2079 | P value* | |
|---|---|---|---|---|---|---|
Total Gn dose (IU)a | 2200 (1500–3000) | 2250 (1500–3300) | 2100 (1587–2862) | 2100 (1500–3000) | 2200 (1500–3000) | 0.284 |
Duration of stimulation (days)a | 10 (9–11) | 10 (9–12) | 10 (9–11) | 10 (9–11) | 10 (9–11) | 0.641 |
No of oocytes retrieveda | 6 (3–10) | 6 (4–10) | 7 (4–10) | 7 (4–10) | 6 (4–10) | 0.176 |
No of embryos transferreda | 2 (2–3) | 2 (2–3) | 2 (2–3) | 2 (2–3) | 2 (2–3) | 0.881 |
Stage of embryo transferred | ||||||
Cleavage, n (%) | 412 (84.8) | 559 (83.1) | 643 (82.0) | 116 (85.3) | 1730 (83.2) | 0.555 |
Blastocyst, n (%) | 74 (15.2) | 114 (16.9) | 20 (14.7) | 141 (18.0) | 349 (16.8) | |
Ovarian response, n (%) | ||||||
> 9 oocytes retrieved | 125 (25.7) | 195 (29.0) | 39 (28.7) | 218 (27.8) | 577 (27.8) | 0.375 |
< 4 oocytes retrieved | 123 (25.3) | 137 (20.4) | 29 (21.3) | 156 (19.9) | 445 (21.4) | |
4–9 oocytes retrieved | 238 (49.0) | 341 (50.7) | 68 (50.0) | 410 (52.3) | 1057 (50.8) | |