Table 1. The baseline characteristics of the study population and differences between pregnant and non-pregnant women.
| All N = 459 | Pregnant N = 206 | Nonpregnant N = 253 | P | |
|---|---|---|---|---|
| Age (y) | 32 (29–35) | 31.5 (29–34) | 33 (30–36) | <0.001 |
| Total gonadotropin dose(75-IU) | 20 (17–26) | 20 (16–24) | 21 (17–27) | 0.026 |
| Duration of stimulation (days) | 9 (8–10) | 9 (8–10) | 9 (8–10) | 0.384 |
| AMH ng/ml | 3.7 (2.2–6) | 4 (2.5–6.5) | 3.4 (1.8–5.5) | 0.005 |
| Inhibin B pg/ml | 56 (32.8–81.1) | 56.4 (30.1–77.8) | 54.6 (33–85) | 0.673 |
| AFC | 12 (7–17) | 13 (9–18) | 10 (6–15) | <0.001 |
| Number of cumulus | 11 (6–16) | 12.5 (9–17) | 9 (5–14) | <0.001 |
| Number of mature oocytes | 7 (4–11) | 8 (6–12) | 6 (2–9) | <0.001 |
| Fertilisation rate | 78.6 (57.1–96.3) | 80.0 (62.5–91.7) | 75.0 (50.0–100) | 0.307 |
| Number of embryos transferred | <0.001 | |||
| 0 | 52 (11.3%) | - | 52 (20.6%) | |
| 1 | 54 (12.8%) | 13 (6.3%) | 41 (16.2%) | |
| 2 | 323 (70.4%) | 179 (86.9%) | 144 (59.9%) | |
| 3 | 30 (6.5%) | 14 (6.8%) | 16 (6.3%) | |
| Good quality of embryos | 207 (of 407) (50.8%) | 130 (63.1%) | 77 (38.1%) | <0.001 |
| LH (IU/L) | 5.8 (4.5–7.4) | 6 (4.6–7.6) | 5.8 (4.4–7.3) | 0.198 |
| FSH(IU/L) | 7.3 (5.9–8.8) | 7.1 (5.8–8.8) | 7.4 (6–8.9) | 0.738 |
| E2 (pg/ml) | 40 (29.9–57) | 40.3 (29–57.5) | 40 (30–57) | 0.872 |
| T (ng/ml) | 1.1 (0.8–1.5) | 1.1 (0.8–1.6) | 1.1 (0.7–1.4) | 0.116 |
| PRL 0′ (mU/L) | 310 (212–479) | 332.5 (191–479) | 293 (218.5–475) | 0.875 |
| PRL 60′ (mU/L) | 4130.5 (2734–5109) | 3957(2785.5–5045.5) | 4346 (2562–5222) | 0.787 |
| DHEA-S (μg/dl.) | 197 (146–256) | 201.5 (143–252) | 195 (146–259) | 0.868 |
| SHBG (ng/ml) | 60 (43.7–83) | 61 (45–91) | 59 (43.4–77) | 0.268 |
| BMI (kg/m2) | 21.9 (20.1–24.2) | 21.4 (19.7–24.1) | 22.3 (20.3–24.3) | 0.108 |
| Durationof infertility(y) | 4 (1.4–4) | 4 (1–4) | 4 (3–4) | 0.159 |
All data are the median (Q1–Q3). The p-values are from the Mann-Whitney U-test