| Table 3. Main characteristics of the performed ETs in the overall population (n=444) and the comparison between the PPO and control groups. The numeric variables are shown as mean ± standard deviation. A p value refers to the comparison using an ANOVA test. The categorical variables are shown by proportion. A p value refers to the comparison using the Chi-square test. *p = 0.05 was considered statistically significant. ET = embryo transfer; PPO = partial premature ovulation. | ||||
| OVERALL N=444 |
PPO GROUP N=111 |
CONTROL GROUP; N=333 |
p value | |
|---|---|---|---|---|
| DAY OF ET Day 5 Day 6 |
83.8% 16.2% |
88.2% 11.8% |
83.2% 16.8% |
0.596 |
| NO. TRANSFERRED EMBRYOS 1 2 |
81.8% 18.2% |
88.2% 11.8% |
81.0% 19.0% |
0.467 |
| EMBRYO QUALITY A B C |
25.7% 55.9% 18.4% |
18.8% 50.0% 31.3% |
26.5% 56.6% 16.9% |
0.360 |
| PREGNANCY RATES Biochemical pregnancy (%) Clinical pregnancy (%) Ongoing pregnancy (%) Live birth (%) Biochemical miscarriage (%) Clinical miscarriage (%) Cumulative ongoing pregnancy (%) After first ET attempt After second ET attempt After third ET attempt After fourth ET attempt |
66.9% 59.7% 46.8% 44.6% 9.7% 21.7% 27.3% (42/154) 39.6% (61/154) 44.2% (68/154) 46.1% (71/154) |
82.4% 70.6% 47.1% 43.8% 14.3% 33.3% 29.4% (5/17) 41.2% (7/17) 41.2% (7/17) 47.1% (8/17) |
65.0% 58.4% 46.7% 44.7% 9.0% 20.0% 27.0% (37/137) 39.4% (54/137) 44.5% (61/137) 46.0% (63/137) |
0.151 0.334 0.979 0.943 0.534 0.296 0.850 0.718 0.840 0.841 |
| NO. ET ATTEMPTS PER PATIENT | 1.62±0.96 | 1.42±0.90 | 1.65±0.97 | 0.432 |
| NO. ET ATTEMPTS UNTIL ONGOING PREGNANCY OR LIVE BIRTH PER PATIENT | 1.34±0.61 | 1.29±0.49 | 1.35±0.63 | 0.787 |