select one diagnosis or diagnostic indicator.
1.Indication of highest likelihood of a chromosomal abnormality
2.Marker for sown dyndrome (trisomy 21)
3.Common marker for trisomies 18 and 21
The ultrasonogram in was performed at approximately 8 weeks after the last menstrual period and shows a placenta but no fetal pole—the classic blighted ovum. Traditionally, 50% of first-trimester spontaneous abortions are said to be chromosomally abnormal. However, more recent evidence suggests that, particularly with advancing age of the mother (ie, in women who are likely to have early ultrasonography for potential CVS), the risk of fetal chromosomal abnormalities is in fact much higher, in many cases approaching even 90% of first-trimester spontaneous abortions.