Table 2

Sample size groupings of the analysed males and females with Down's syndrome

Males
Age (months)	0	1	2	3	4	5	6	7	8	9	10
No. of observations	120	76	68	57	50	55	49	50	38	43	43
Age (months)	11	12	13	14	15	16	17	18	19	20	21
No. of observations	41	48	25	38	26	35	24	20	22	26	16
Age (months)	22	23	24–26	27–29	30–32	33–35
No. of observations	15	19	63	56	45	44
Age (years)	3	4	5	6	7	8	9	10	11	12	13
No. of observations	99	81	47	47	41	46	38	35	34	29	23
Age (years)	14	15	16	17	18
No. of observations	45	35	30	30	35

Females
Age (months)	0	1	2	3	4	5	6	7	8	9	10
No. of observations	90	50	48	53	41	39	51	32	31	39	33
Age (months)	11	12	13	14	15	16	17	18	19	20	21
No. of observations	22	55	18	20	17	20	10	40	15	13	18
Age (months)	22	23	24–26	27–29	30–32	33–35
No. of observations	13	13	37	26	31	19
Age (years)	3	4	5	6	7	8	9	10	11	12	13
No. of observations	61	56	45	41	57	47	47	50	42	38	47
Age (years)	14	15	16	17	18
No. of observations	45	44	29	29	37