Fig. 3
From: Population monitoring of trisomy 21: problems and approaches
Monthly birth prevalence of Down syndrome (DS) in Oman from 2000 to 2004 (N = 518). a. All DS newborns. b. The regions with the highest DS prevalence South Batinah and Dakhliya (dark columns) and the regions with the lowest prevalence North Batinah, South Sharqiyah and Dhofar (light columns).The arrow points to January, the month with the highest prevalence (1 DS per 147 newborns; after [49], modified)