Characteristics | Miscarriage cases (n = 28) | Live-birth controls (n = 56) | P value |
---|---|---|---|
Maternal age at oocyte retrieval, y | 29.6 ± 3.7 | 29.6 ± 3.2 | 0.945 |
Maternal BMI, kg/m2 | 21.8 ± 3.1 | 21.3 ± 2.7 | 0.421 |
Gravidity | 1.0 (0–4) | 2.0 (0–4) | 0.194a |
Parity | 0.0 (0–1) | 0.0 (0–2) | 0.932a |
No. of previous miscarriages, n | 1.0 (0–4) | 2.0 (0–4) | 0.095a |
Basal E2 level, pg/ml | 29.2 ± 9.4 | 29.0 ± 13.5 | 0.940 |
Basal FSH level, IU/ml | 5.6 ± 0.9 | 5.5 ± 1.3 | 0.726 |
E2 level on HCG day, pg/ml | 3141 ± 1387.9 | 3127 ± 1110.1 | 0.962 |
No. of retrieved oocytes | 21.1 ± 10.7 | 19.3 ± 7.8 | 0.390 |
No. of good-quality blastocysts | 6.8 ± 4.6 | 6.6 ± 3.4 | 0.809 |
No. of embryos available to transfer | 6.9 ± 4.0 | 6.5 ± 2.8 | 0.618 |
Blastocyst transfer | 0.380b | ||
D5 | 19 (67.9) | 43 (76.8) | |
D6 | 9 (32.1) | 13 (23.2) | |
COS protocol | 0.071b | ||
Long agonist | 4 (14.3) | 19 (33.9) | |
Short agonist | 6 (21.4) | 15 (26.8) | |
Antagonist | 18 (64.3) | 22 (39.3) |