Table 2.

Comparison between the high-quality cleavage embryo group and the non-high-quality cleavage embryo group

Characteristics	Non-high-quality cleavage embryo group (N = 2266)	High-quality cleavage embryo group (N = 1950)	P value
Cycle Type			0.784
First Cycle	939(41.44%)	799(40.97%)
Repeat Cycle	1327(58.56%)	1151(59.03%)
Type of infertility			0.331
Primary infertility	737(32.52%)	606(31.08%)
Secondary infertility	1529(67.48%)	1344(68.92%)
Duration of infertility (years)	5.30 ± 4.57	5.16 ± 4.69	0.043
Age (years)	37.62 ± 5.61	37.44 ± 5.56	0.278
BMI	22.27 ± 2.85	22.36 ± 2.86	0.192
Basal FSH (mIU/mL)	13.10 ± 7.78	12.62 ± 6.98	0.140
Basal LH (mIU/mL)	5.27 ± 5.30	4.78 ± 3.35	0.157
FSH/LH	3.21 ± 7.23	3.28 ± 7.74	0.563
Basal P (ng/mL)	0.93 ± 1.88	0.91 ± 1.74	0.300
Basal E2 (pg/mL)	69.88 ± 79.84	69.53 ± 112.95	0.182
AFC	2.71 ± 1.03	2.78 ± 1.02	0.020
AMH (ng/mL)	0.48 ± 0.30	0.54 ± 0.31	7.18E-10
FSH on HCG day (mIU/mL)	19.21 ± 6.16	19.12 ± 5.77	0.909
LH on HCG day (mIU/mL)	3.43 ± 2.75	2.84 ± 2.38	4.71E-13
P on HCG day (ng/mL)	0.76 ± 0.60	0.80 ± 0.82	0.047
E2 on HCG day (pg/mL)	936.56 ± 605.29	1171.06 ± 772.61	1.02E-29
Delta FSH	9.76 ± 6.73	9.83 ± 6.48	0.497
Delta LH	-0.91 ± 3.12	-1.33 ± 2.77	2.37E-06
Delta P	0.04 ± 0.87	0.06 ± 1.64	0.135
Delta E2	862.70 ± 613.65	1101.97 ± 774.65	1.85E-31
Number of follicles ≥ 14 mm on HCG day	2.25 ± 1.42	2.96 ± 1.85	1.09E-46
Total dose of Gn (IU)	1701.17 ± 832.45	1825.58 ± 764.52	1.59E-10
Dosing days of Gn (day)	8.31 ± 3.09	8.74 ± 2.98	4.90E-08
Retrieved oocytes	1.97 ± 1.35	2.93 ± 2.00	1.46E-80
MII oocytes	1.73 ± 1.23	2.73 ± 1.84	1.03E-100
2PN fertilized oocytes	1.07 ± 1.04	2.24 ± 1.50	3.79E-204

Continuous variables are expressed as mean ± SD, categorical variables as absolute frequencies, n (%)

BMI, body mass index; FSH, follicular-stimulating hormone; LH, luteinizing hormone; P, progesterone; E2, estradiol; AFC, antral follicle count; AMH, anti-Müllerian hormone; Gn, gonadotropin; HCG, human chorionic gonadotropin