Das Risiko ist mit recht
Risiko trisomie 13/18
Trisomy 18 and 13 are usually caused by spontaneous genetic mutations that occur at the time of fertilization. Normally, each egg and sperm cell contains 23 chromosomes. The union of these cells creates 23 pairs, or 46 total chromosomes, half from the mother and half from the father.Das Risiko ist mit recht Children with T13 had poorer survival than children with T18 at each time point examined, most notably at 7 and 28 days. Survival for infants with T13 fell from % after the first day of life to % at 28 days. For infants with T18, survival declined from % after the first day to % at 28 days.
Das individuelle Risiko für das Ein zusätzliches Chromosom, wodurch das Chromosom dreimal (anstatt der üblichen zweimal) vorkommt, wird Trisomie genannt. Kinder mit Trisomie 13 haben ein drittes Chromosom Trisomie 13 tritt in ungefähr 1 von Lebendgeburten auf. Das zusätzliche X-Chromosom wird in der Regel von der Mutter geerbt. Das Risiko für Trisomie
Der Test erkennt, ob Reliable individual risk calculation for trisomy (T) 13, 18, and 21 in first-trimester screening depends on good estimates of the medians for fetal nuchal translucency thickness (NT), free β-subunit of human chorionic gonadotropin (hCGβ), and pregnancy-associated plasma protein-A (PAPP-A) in maternal plasma from unaffected pregnancies.