Table 4b. Analyses of significance differences (p< 0,05) between maternal age groups (A=≤34 years old; B= 35 to 37 years old; C=38 to 40 years old and D=≥40 years old) and prior infertility history (groups 4, 5 and 6) according to proposed chromosomal errors. (IVFF = In Vitro Fertilization Failure; AB = abortion)
More than 2 IVFF	Group	<=34 (%)	35-37 (%)	38-40 (%)	>40 (%)	P	Total (%)
	aneuploid	61.7	58.8	71.1	88.1	0.007	70.7
	Monosomy	22.8	20.8	12.4	5.6	0.104	14.4
	Trisomy	16.1	20.0	20.5	13.0	0.795	18.0
	multiple	19.3	20.8	35.1	36.1	0.133	29.6
	complex	16.8	21.9	21.3	38.2	0.104	24.7
	duplication	3.1	3.3	1.3	4.8	0.929	2.8
	deletion	11.5	9.2	5.3	2.4	0.336	6.5
	DNA degradation	1.3	7.3	1.7	5.7	0.136	3.7
More than 2 AB	aneuploid	53.1	71.1	78.4	89.7	<0.001	75.6
	Monosomy	31.1	22.6	28.3	23.2	0.616	25.8
	Trisomy	21.2	3.0	29.3	8.6	0.113	21.5
	multiple	15.2	20.2	24.3	32.0	0.380	24.1
	complex	10.0	18.5	17.2	23.6	0.387	18.3
	duplication	3.0	1.8	1.0	2.5	0.972	2.0
	deletion	11.4	6.0	0	10.1	0.432	6.8
	DNA degradation	1.5	6.8	7.2	1.8	0.447	4.3
No failures	aneuploid	53.4	59.4	73.0	83.3	<0.001	68.7
	Monosomy	12.1	28.0	21.3	12.6	0.010	17.8
	Trisomy	24.3	16.8	16.9	11.2	0.137	17.0
	multiple	19.9	15.7	27.8	29.0	0.155	24.0
	complex	25.8	21.9	23.8	42.3	0.014	29.4
	duplication	5.2	4.3	4.5	4.0	0.891	29.4
	deletion	3.7	9.3	3.1	0.8	0.016	3.8
	DNA degradation	0.5	9.6	2.2	6.8	<0.001	4.5