We describe here 6 cases of 18-trisomy syndrome and a possible seventh (Fig. 1). Table 1 lists the most frequent anomalies found in these patients. Case 1. M.C. was the 3d child of a Caucasian ...

A century after Down syndrome was first described, scientists discovered that the root cause of this disorder is a condition called trisomy 21. What strides in research have been made since then?

This shows maternal-age-specific estimates of trisomy among all clinically recognized human pregnancies, generated by combining data from individual trisomies and assuming a spontaneous abortion ...