borderline significantP = 0.05
marginally significantP = 0.06
However, possibly owing to a small sample size, the effect of single embryo transfer only reached a borderline significant effect for ongoing pregnancy (OR = 0.4; 95% CI: 0.1, 1.0; P = 0.05) and a marginally significant effect for live birth (OR = 0.4; 95% CI: 0.1, 1.0; P = 0.06) (Table III ).