[Aspects foetopathologiques de 97 cas d'anencephalie: etude du CMNR Tunis]

So, the epidemiologic study done for 8 years at CMNR Tunis has shown that the incidence is 1,15%o births [between 0,52 and 1,66%o per year]. This anomaly is more frequent in Female sex [sex linked = 0,59]. The antenatal echographic diagnosis is efficient in 90,5%. This anomaly is more shown at low socio-economic group. The improvement of the socio-economic level and specially the daily uptake of acid folic in periconceptionnel time decrease the frequency of this congenital malformation