Table 8. Logistic regression analysis of factors affecting low placental position.

Variables	Univariate analysis p value	OR	(95% CI)	Multivariate p-value analysis	OR	(95% CI)
Female age	0.878	0.985	(0.813,1.194)
Infertility duration	0.934	0.989	(0.756,1.293)
bFSH	0.281	0.792	(0.518,1.210)
bLH	0.402	0.935	(0.800,1.094)
bE2	0.664	0.995	(0.972,1.018)
BMI	0.551	1.067	(0.862,1.321)
AFC	0.705	0.988	(0.927,1.052)
E2 on trigger day	0.722	1.000	(1.000,1.000)
Endometrial thickness on trigger day	0.433	0.905	(0.706,1.160)
Total gonadotropin dose	0.703	1.000	(0.999,1.001)
Gn stimulation duration	0.964	0.993	(0.723,1.363)
Retrieved oocyte number	0.090	1.073	(0.989,1.164)
Number of good-quality embryos	0.663	1.041	(0.869,1.247)
Fertilization method	0.723	1.275	(0.332,4,902)
Delivery method	0.009	0.126	(0.027,0.591)	0.061	0.153	(0.022,1.089)
Day of embryotransfer	0.048	0.211	(0.045,0.986)	0.763	0.738	(0.102,5.321)
PCOS	0.664	1.313	(0.384,4.493)