Table 2.
Adjusted relative risk for live-birth according to cleavage-stage embryo quality
| Embryo quality | Number of cycles | Number of live-birth (LBR per cycle, %) | aRR (95%CI) a | aRR (95%CI) b | aRR (95%CI) c |
|---|---|---|---|---|---|
| Q1 (1 point) | 770 | 104 (13.5) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Q2 (2 points) | 2620 | 802 (30.6) | 1.99 (1.62–2.44) | 1.94 (1.57–2.39) | 1.93 (1.56–2.38) |
| Q3 (3 points) | 3315 | 1348 (40.7) | 2.43 (1.98–2.98) | 2.35 (1.91–2.90) | 2.34 (1.89–2.88) |
| Q4 (4 points) | 3154 | 1590 (50.4) | 2.88 (2.35–3.53) | 2.74 (2.21–3.40) | 2.72 (2.19–3.38) |
| Q5 (5 points) | 2993 | 1629 (54.4) | 3.07 (2.50–3.76) | 2.92 (2.35–3.62) | 2.90 (2.33–3.60) |
| Q6 (6 points) | 1384 | 613 (44.3) | 3.27 (2.64–4.06) | 3.12 (2.48–3.91) | 3.10 (2.47–3.89) |
| Pfor trend | <0.001 | <0.001 | <0.001 |
Abbreviations: LBR Live-birth rate, aRR Adjusted relative risk, CI Confidence interval
a Adjusted for maternal age, maternal BMI, Basal FSH, Basal LH, Basal T, Basal PRL, duration of infertility, infertility type, male factor of infertility, anovulation factor of infertility, Gn dosage, Gn duration, cycle protocols, E2 on hCG day, year of transfer, oocytes retrieved and location of fertility centers
b Adjusted for maternal age, maternal BMI, basal FSH, basal LH, basal T, basal PRL, duration of infertility, infertility type, male factor of infertility, anovulation factor of infertility, Gn dosage, Gn duration, cycle protocols, E2 on hCG day, year of transfer, oocytes retrieved, location of fertility centers and number of embryos transferred
c Adjusted for maternal age, maternal BMI, basal FSH, basal LH, basal T, basal PRL, duration of infertility, infertility type, male factor of infertility, anovulation factor of infertility, Gn dosage, Gn duration, cycle protocols, E2 on hCG day, year of transfer, oocytes retrieved, location of fertility centers, number of embryos transferred and EMT