Table 4a. 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 1, 2 and 3) according to proposed chromosomal errors. (IVFF = In Vitro Fertilization Failure; AB = abortion)
More than 1 IVFF and more than 1 AB	Group	<=34 (%)	35-37 (%)	38-40 (%)	>40 (%)	P	Total (%)
	aneuploid	64.2	63.0	73.0	85.1	0.013	74.1
	Monosomy	16.7	32.4	22.6	14.9	0.116	21.5
	Trisomy	16.7	12.5	14.3	7.6	0.224	11.5
	multiple	35.6	17.9	32.4	40.0	0.053	31.9
	complex	9.2	22.5	19.8	35.2	0.276	25.4
	duplication	0.00	4.8	4.6	0.6	0.171	2.6
	deletion	13.6	1.0	3.2	0.00	<0.001	2.5
	DNA degradation	1.1	3.6	7.2	1.9	0.186	3.6
1 IVFF only	aneuploid	68.1	63.0	81.7	80.7	0.081	76.7
	Monosomy	18.8	27.8	19.2	13.0	0.399	18.4
	Trisomy	18.8	15.4	15.6	6.5	0.274	12.7
	multiple	46.9	32.3	30.4	40.4	0.509	36.0
	complex	15.6	24.5	23.2	31.8	0.791	25.6
	duplication	0.0	0.0	4.3	3.7	0.230	2.9
	deletion	0.0	0.0	3.7	2.2	0.271	2.1
	DNA degradation	1.4	5.6	0.4	3.8	0.271	2.6
1 AB only	aneuploid	55.4	70.0	72.5	82.1	0.020	72.6
	Monosomy	33.3	12.2	28.8	13.8	0.063	21.1
	Trisomy	0.0	12.8	18.3	16.3	0.177	13.8
	Multiple	27.8	27.6	27.9	50.4	0.180	35.1
	complex	27.8	32.2	13.2	17.1	0.494	20.5
	duplication	5.6	8.5	6.7	2.5	0.944	5.5
	deletion	5.6	1.5	0.8	0.0	0.558	1.4
	DNA degradation	12.0	0.0	0.0	1.3	0.004	2.2