Turner Syndrome

tors for turner syndrome ar non well know. Genetic photomosaicism (46XX/45XO) is or so often implicated, aboard nondisjunction (45XO) and partial monosomy (46XX). Nondisjunctions increase with agnatic age, much(prenominal) as for Down syndrome, exclusively that effect is not run through and through for food turner syndrome. It is also outlander if thither is a transmissible predisposition present that causes the antidromicity, though most researchers and doctors treating Turners women agree that this is exceedingly unlikely. In 75% of cases inactivated X chromosome is paternal origin. There is ahead long no known cause for Turner syndrome, though there are some(prenominal) theories surrounding the subject. The only immobile feature that is known immediately is that during conception part or all(a) of the second sex chromosome is not transferred to the fetus.[8] In other words, these females do not arrive at Barr bodies, which are those X chromosomes inactivated by the cell. [edit]Diagnosis [edit]Prenatal 45,X karyotype, see an unpaired X at the lower right Turner syndrome whitethorn be diagnosed by amniocentesis or chorionic villus enjoy during pregnancy. Often, fetuses with Turner syndrome can be identified by kinky ultrasound findings (i.e.

heart defect, kidney abnormality, cystic hygroma, ascites). In a learn of 19 European registries, 67.2% of prenatally diagnosed cases of Turner Syndrome were detected by abnormalities on ultrasound. 69.1% of cases had one anomaly present, and 30.9% had devil or more(prenominal) anomalies.[9] An careen magnitude risk of Turner Syndrome may also be indicated by abnormal three or quadruple agnate blood blood serum screen. The fetuses diagnosed through positive maternal serum screening are more often found to bemuse a mosaic karyotype than those diagnosed found on ultrasonographic abnormalities, and conversely those with mosaic karyotypes are less(prenominal) likely to have associated ultrasound abnormalities.[10]If you want to lower a full essay, ball club it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.