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| | USDSM Birth Defects Genetics Center Home Page |
 | | It is important to recognize that the vast majority of neural tube defects, 90 to 95 percent, occur in families with a negative family history. |
 | | Various abnormalities, ASD, VSD, PDA are common to trisomy 13 and trisomy 18 with the addition of dextroposition of the heart for trisomy 13 and the tetralogy of Fallot for trisomy 18. |
 | | Among the 38 cases with abnormal karyotypes are trisomy 21, 18, 13 and 9 and 45,X. The highest abnormality was in the atrial ventricular septal defect group; coarctation of the aorta, VSD, conotruncal defect, complex abnormality, hypoplastic left heart, right heart defect with pulmonary stenosis or atresia. |
| www.usd.edu /med/som/genetics/antenatalscreening.htm (6705 words) |
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