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. 2020 Apr 30;11:279. doi: 10.3389/fendo.2020.00279

Table 2.

Univariate analysis of factors on clinical pregnancy.

Variable	Pregnancy	None Pregnancy	P
HCG priming, % (no.)	34.4 (32/93)	38.9 (70/180)	0.468^b
Age, years	30.32 ± 3.78	29.86 ± 3.57	0.509^a
Primary infertility, % (no.)	76.3 (71)	74.4 (134)	0.731^b
Duration of infertility, years	5.09 ± 3.01	4.81 ± 2.70	0.639^a
BMI, kg/m²	25.08 ± 4.27	25.39 ± 4.16	0.532^a
Basal FSH, IU/L	5.72 ± 1.51	5.40 ± 1.68	0.202^a
Antral follicle count	33.68 ± 11.63	32.00 ± 11.47	0.285^a
No. of oocytes retrieved	18.08 ± 10.78	17.18 ± 11.10	0.422^a
No. of mature oocytes	8.49 ± 4.64	8.26 ± 5.42	0.367^a
Maturation rate (%)	52.41 ± 21.37	51.75 ± 22.94	0.767^a
No. of fertilized oocytes	5.95 ± 3.32	4.88 ± 3.66	0.002^a
Fertilization rate (%)	72.49 ± 20.60	61.23 ± 24.04	0.000^a
No. of cleavage embryos	7.00 ± 3.60	5.93 ± 4.11	0.007^a
Cleavage rate (%)	83.11 ± 17.46	73.64 ± 20.88	0.001^a
No. of embryos available	3.76 ± 2.66	3.34 ± 3.10	0.002^a
Available embryo rate (%)	50.04 ± 26.37	43.19 ± 22.56	0.052^a
No. of embryos transferred	2.16 ± 0.40	1.96 ± 0.54	0.002^a
Endometrial thickness(mm)	8.00 ± 1.33	7.82 ± 1.67	0.495^a

Numbers are mean ± SD unless otherwise indicated; No., number;

^a

Mann–Whitney U-test;

^b

Chi-square test.