Table 4.

Prevalence rates of pregnancies with Down syndrome (per 10000), Czech Republic (1994–98)

Age of mother	1994	1995	1996	1997	1998	Total
-19	6.26	8.45	4.90	5.74	8.25	6.70
20–22	5.36	6.16	8.14	7.66	11.01	7.36
23–25	5.62	8.13	9.15	8.90	7.35	7.80
26–28	7.60	9.27	6.23	8.14	11.82	8.69
29–31	12.96	6.68	6.80	9.60	16.35	10.57
32–34	26.79	13.14	26.73	14.56	31.52	22.66
35–37	21.02	36.90	48.87	45.26	52.05	40.93
38–40	125.28	96.85	86.68	102	92.88	101.07
41–43	306.12	187.2	305.6	292.4	400	297.03
44+	333.33	615.4	169.5	204.1	317.5	337.84
Total	10.94	11	12.34	12.32	16.29	12.50