Table 1.
Patient and cycle characteristics by pregnancy outcome
| Characteristic | Clinical Pregnancy | Negative Pregnancy | P-Value |
| Age (years)a | 32.4 ± 3.5 | 34.1 ± 4.1 | 0.019* |
| BMI (kg/m2)b | 24.7 ± 4.2 | 25.7 ± 5.2 | 0.573 |
| FSH (mIU/mL)b | 6.7 ± 2.3 | 7.1 ± 1.9 | 0.167 |
| Peak E2 (pg/mL)a, c | 3146.9 ± 1255.9 | 3498.2 ± 1267.0 | 0.142 |
| Number of Eggs Retrieveda | 18.4 ± 6.9 | 20.4 ± 7.2 | 0.120 |
| Number of Mature Eggsb | 15.8 ± 6.5 | 17.3 ± 6.4 | 0.176 |
| Number of Eggs Fertilizedb | 11.9 ± 4.6 | 12.9 ± 4.6 | 0.199 |
| Number of Day 2 Embryosb | 11.9 ± 4.3 | 12.2 ± 4.1 | 0.573 |
| Number of Day 3 Embryosb | 10.4 ± 3.8 | 10.7 ± 3.5 | 0.608 |
| Number of Blastocystsb | 6.6 ± 3.3 | 5.9 ± 2.8 | 0.435 |
| Endometrial Stripe (mm)b | 11.2 ± 3.1 | 10.1 ± 2.6 | 0.022* |
| Number of Blastocysts Transferredb | 2.0 ± 0.6 | 2.2 ± 0.7 | 0.349 |
| Number of Blastocysts Cryopreservedb | 2.3 ± 2.6 | 1.9 ± 2.4 | 0.393 |
a T-Test bMann-Whitney U-test cdenotes estradiol value 1 day prior to oocyte retrieval
* denotes statistical significance; Data expressed as mean ± SD with n = 57 in each group.