Table 4.

Adjusted fertilization, day 3 good-quality embryos, blastocyst formation and high-quality blastocyst (95% CI) by quartile of OS/FP (N = 6110). .

	Fertilization (rate)aAdjusted OR (95% CI)	Day 3 good-quality embryos (rate)bAdjusted OR (95% CI)	Blastocyst formation (rate)cAdjusted OR (95% CI)	High-quality blastocyst formation (rate)dAdjusted OR (95% CI)
Q1 (< 0.57)	Ref	Ref	Ref	Ref
Q2 (0.57, 0.67)	1.05 (1.00, 1.10)	1.05 (0.99, 1.10)	1.05 (0.98, 1.13)	0.98 (0.87, 1.10)
Q3 (0.67, 0.77)	1.11 (1.06, 1.17)**	1.04 (0.99, 1.11)	0.93 (0.86, 1.00)	0.93 (0.82, 1.07)
Q4 (≥ 0.77)	1.08 (1.02, 1.14)**	0.99 (0.93, 1.04)	0.98 (0.91, 1.06)	0.84 (0.73, 0.96)**
P	<0.001**	0.564	0.147	<0.01**

^aModels were adjusted for maternal age, BMI, fertility status, etiology of infertility, AMH, type of ovarian stimulation gonadotropin initial dose, and IVF/ICSI techniques.

^bModels were adjusted for maternal age, BMI, smoke, fertility status, type of ovarian stimulation, gonadotropin initial dose, and IVF/ICSI techniques.

^cModels were adjusted for maternal age, BMI, type of ovarian stimulation, gonadotropin initial dose, and IVF/ICSI techniques.

^dModels were adjusted for maternal age, BMI, fertility status, type of ovarian stimulation, gonadotropin initial dose, and IVF/ICSI techniques.

A total of 2812 participants had embryos continuously cultured to the blastocyst stage.

*P < 0.05, **P < 0.01. The P value is for the overall trend.