The impact of body mass index on laboratory, clinical outcomes and treatment costs in assisted reproduction: a retrospective cohort study

Table 4 ART outcomes analysis compared between groups

Variables	G1	G2	G3	p
	n = 1270	n = 356	n = 127
Fertilization rate (%)	76.6	74.7	76.5	0.442^b
Implantation rate (%)	28.4	27.5	23.2	0.187^b
Biochemical pregnancy rate (%)
Total	44.5	44.8	39.7	0.555^b
D3	43.3	43	37.2	0.285^b
D5	46.7	47.5	42.2	0.285^b
Cumulative^a	52.6	52	45.1	0.318^c
Cumulative Linear Association				0.204^d
Clinical pregnancy rate (%)
Total	40.1	39.7	32.5	0.262^b
D3	40.4	37.6	30.2	0.466^b
D5	41.5	41.5	34.4	0.466^b
Cumulative^a	48	46.7	36.3	0.061^c
Cumulative Linear Association				0.042^b

G1. Group 1 BMI ≤ 24.9 kg/m², G2. Group 2 BMI 25–29.9 kg/m², G3. Group 3 BMI ≥ 30 kg/m²
n. Sample size regarding follicle-stimulation cycles, D3. Embryo transfer in cleavage stage,
D5. Embryo transfer in blastocyst stage
Values presented as n (%). * p < 0.05
^a Clinical pregnancy among total cycles of each patient
^bGeneralized Estimating Equations, ^cQui-square test/post hoc, ^dLinear-by-linear association

ISSN: 1472-6874