TABELLA 247-1. RISCHIO DELLA NASCITA DI UN
BAMBINO CON UN’ANOMALIA CROMOSOMICA

Età materna

Rischio di sindrome di Down

Rischio di una qualche anomalia cromosomica*

20

1/1667

1/526

22

1/1429

1/500

24

1/1250

1/476

26

1/1176

1/476

28

1/1053

1/435

30

1/952

1/384

32

1/769

1/323

34

1/500

1/238

35

1/385

1/192

36

1/294

1/156

37

1/227

1/127

38

1/175

1/102

39

1/137

1/83

40

1/106

1/66

41

1/82

1/53

42

1/64

1/42

43

1/50

1/33

44

1/38

1/26

45

1/30

1/21

46

1/23

1/16

47

1/18

1/13

48

1/14

1/10

49

1/11

1/8

*47,XXX esclusa per le età da 20 a 32 (dati non disponibili).

Dati da Hook EB: "Rates of chromosome abnormalities at different maternal ages." Obstetrics and Gynecology 58:282285, 1981; and Hook EB, Cross PK, Schreinemach ers DM: "Chromosomal abnormality rates at amniocentesis and in live-born infants." Journal of the American Medical Association 249:20342038, 1983.


Chiudi Stampa