Regrouping based on the cut-off value to investigate whether
embryo stages were an independent risk factor for pregnancy outcomes
Multivariable logistic regression analysis on the cohort with an average
distance under 2.146 cm demonstrated no statistically significant
differences in the CPR and LBR between the blastocyst transfer and
cleavage-stage ET groups (CPR: adjusted OR 2.165, 95% CI 0.284-16.494;
LBR: adjusted OR 1.494, 95% CI 0.225-9.908; P >
0.05), which were adjusted for maternal age, BMI, outcomes of the COH
cycle, insemination method, number of embryos transferred, and
infertility causes.
Multivariable logistic regression analysis on the cohort with an average
distance ≥ 2.146 cm demonstrated that the CRP and LBR of the blastocyst
transfer group were significantly higher than those of the
cleavage-stage ET group (CPR: adjusted OR 9.834, 95% CI 2.035-47.526;
LBR: adjusted OR 4.135, 95% CI 1.063-16.083) (P <
0.05) (Tables S2, S3).