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Table 3 Multivariate logistic regression model of sex ratio among singleton births following single blastocyst frozen embryo transfer (FET) cycles in relation to blastocyst quality and morphology

From: Does the sex ratio of singleton births after frozen single blastocyst transfer differ in relation to blastocyst development?

Variable aOR(95% CI) P value
 Good 1.57 (1.24 ~ 2) < 0.001
 Poor Reference  
Expansion degree
 4 Reference  
 5 0.96 (0.61 ~ 1.49) 0.843
 6 1.63 (0.89 ~ 2.99) 0.111
Inner cell mass
 A 0.71 (0.49 ~ 1.01) 0.059
 B Reference  
Trophectoderm
 A 1.4 (0.91 ~ 2.16) 0.128
 B 1.71 (1.33 ~ 2.21) < 0.001
 C Reference  
  1. Note: Sex ratio adjusted for age, BMI, type of fertilization, day of embryo transfer. P < 0.05 was considered statistically significant. BMI = body mass index; CI = confidence interval