Table 4.

Logistic regression analysis for neonatal outcome according to number and stage of embryo transfer among singletons.

	LBW OR (95%CI)	HBW OR (95%CI)	SGA OR (95%CI)	LGA OR (95%CI)
Blastocyst vs. Cleavage embryo	1.01(0.65,1.56)	1.37(1.07,1.77)	0.96(0.73,1.26)	1.15(0.97,1.37)
Double vs. single embryo	1.34(0.89,2.06)	1.22(0.94,1.56)	1.00(0.78,1.29)	1.06(0.90,1.24)
Maternal age	1.01(0.96,1.06)	0.97(0.94,1.00)	1.01(0.98,1.04)	0.98(0.96,1.00)
Paternal age	1.01(0.97,1.05)	1.02(0.99,1.04)	0.99(0.96,1.01)	1.01(0.99,1.02)
Maternal BMI	0.98(0.95,1.01)	1.12(1.10,1.15)	0.98(0.96,1.00)	1.08(1.05,1.09)
Type of infertility
Second vs. Primary infertility	0.99(0.73,1.34)	1.16(0.98,1.39)	0.88(0.73,1.05)	1.21(1.07,1.36)
Parity
Pluriparous vs. Nulliparous	0.79(0.46,1.35)	1.33(0.98,1.79)	0.81(0.56,1.17)	1.17(0.95,1.43)
Duration of infertility	1.03(0.93,1.13)	0.98(0.93,1.04)	1.00(0.95,1.06)	1.00(0.96,1.04)
Infertility causes
Female factor(reference)
Male factor	1.35(0.85,2.14)	0.83(0.62,1.10)	1.04(0.79,1.37)	1.00(0.83,1.19)
Combined factor	1.24(0.88,1.75)	0.89(0.72,1.10)	1.15(0.93,1.41)	0.95(0.83,1.09)
Unexplained	1.31(0.79,2.18)	0.89(0.66,1.20)	1.13(0.84,1.52)	0.95(0.78,1.16)
Fertilization type
IVF-only (reference)
ICSI-only	1.09(0.70,1.68)	0.96(0.75,1.24)	0.99(0.77,1.29)	1.00(0.84,1.18)
IVF/ICSI split	0.61(0.30,1.24)	1.25(0.83,1.89)	0.97(0.64,1.48)	1.10(0.84,1.45)
Sperm origin
TESE vs. Ejaculation	0.11(0.02,0.60)	1.21(0.69,2.11)	0.70(0.36,1.37)	0.81(0.54,1.22)
Endometrial preparation program  Natural cycle (reference)
Mild Stimulation cycle	1.10(0.77,1.58)	0.83(0.68,1.02)	0.97(0.79,1.19)	0.92(0.80,1.05)
Hormonal replacement cycle	1.10(0.76,1.58)	1.10(0.90,1.34)	0.93(0.75,1.16)	1.13(0.99,1.30)
Neonatal gender
Female vs. male	1.54(1.16,2.03)	0.56(0.48,0.66)	1.26(1.07,1.49)	0.96(0.87,1.07)
Gestational age	0.31(0.29,0.34)	1.69(1.56,1.83)	0.84(0.80,0.87)	1.14(1.10,1.19)

OR, odds ratio; CI, confidence interval.