From: Associated factors of secondary sex ratio of offspring in assisted reproductive technology: a cross-sectional study in Jilin Province, China
Variables
OR
95%CI
P
Paternal age group
20 ~ 29
1.000
30 ~ 39
1.020
0.850–1.223
0.833
40 ~ 49
1.220
0.894–1.665
0.209
50 ~ 59
0.298
0.082–1.079
0.065
Fertilization methods
IVF
ICSI
0.808
0.681–0.958
0.014
R-ICSI
1.261
0.924–1.721
0.143