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Table 4 Interaction between the developmental stage of the transferred embryos and the effect of PE on CPRs

From: Progesterone elevation on the day of human chorionic gonadotropin administration adversely affects the outcome of IVF with transferred embryos at different developmental stages

Factors OR (95 % CI) p-value
Female age (years) 0.930(0.872-0.993) 0.031
No. of transferred TQE 1.102(1.031-1.179) 0.004
Developmental stage 0.842(0.718-0.987) 0.004
Progesterone elevation (ng/ml)ª   <0.001
Developmental stageb PE (ng/ml)   
0-0.49   0.369
0.50-0.74   0.099
0.75-0.99   0.921
1.00-1.24   0.828
1.25-1.49   0.861
1.50-1.74   0.799
1.75-1.99   0.058
2-   0.228
  1. Note: TQE: top-quality embryo; OR: odds ratio; CI: confidence interval. developmental stage: cleavage versus blastocyst stage, PEª was defined as an unordered categorical variable according to progesterone levels: <0.50, 0.50-074, 0.75-0.99, 1.00-1.24, 1.25-1.49, 1.50-1.74, 1.75-1.99 and ≥2.00 ng/ml. The 95 % CIs of developmental stage bPE were all covered 1