Table 1.
Baseline characteristics according to estradiol exposure duration.
| Short (8-9 days) exposure (n=980) | Intermediate (10-11 days) exposure (n=746) | Prolonged (12-14 days) exposure (n=275) | p | |
|---|---|---|---|---|
| Age (years) | 29.9 ± 4.6 | 29.7 ± 4.7 | 30.2 ± 4.6 | 0.349 |
| Body mass index (kg/m2) | 26.5 ± 5.9 | 26.2 ± 5.7 | 26.9 ± 6.1 | 0.137 |
| Duration of infertility (years) | 4.3 ± 2.9 | 4.2 ± 2.8 | 4.1 ± 2.9 | 0.319 |
| Previous IVF attempts | 2.2 ± 1.4 | 2.2 ± 1.4 | 2.1 ± 1.5 | 0.673 |
| Primary infertility | 916 (93.5) | 702 (94.1) | 258 (93.8) | 0.864 |
| Infertility causes | 0.083 | |||
| Unexplained | 193 (19.7) | 142 (19.0) | 58 (21.1) | |
| Tubal factor | 45 (4.6) | 39 (5.2) | 15 (5.5) | |
| Polycystic ovary syndrome | 262 (26.7) | 190 (25.5) | 69 (25.1) | |
| Endometrioma | 40 (4.1) | 52 (7.0) | 20 (7.3) | |
| Diminished ovarian reserve | 111 (11.3) | 66 (8.8) | 24 (8.7) | |
| Male factor infertility | 179 (18.3) | 118 (15.8) | 53 (19.3) | |
| Combination | 150 (15.3) | 139 (18.6) | 36 (13.1) | |
| Ovarian reserve status | 0.577 | |||
| Diminished ovarian reserve | 133 (13.6) | 96 (12.9) | 31 (11.3) | |
| Normal ovarian reserve | 468 (47.8) | 346 (46.4) | 142 (51.6) | |
| Polycystic ovary syndrome | 379 (38.7) | 304 (40.8) | 102 (37.1) |
Values are given as mean (± standard deviation) or number (percentage).