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Klinefelter syndrome is not an inherited condition. The extra X chromosome comes from the mother in approximately 50% of the cases. Maternal age is the only known risk factor. Women at 40 years have a four-times-higher risk of a child with Klinefelter syndrome than women aged 24 years. [15] [35] [36]
XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [ 2 ] These may include being taller than average and an increased risk of learning disabilities .
48,XXYY syndrome is a condition related to the X and Y chromosomes (the sex chromosomes). People normally have 46 chromosomes in each cell.Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics.
Aicardi syndrome is an autosomal dominant X-linked disease and arises as a new mutation. The mutation has then usually occurred in one of the parents' germ cells (eggs or sperm). The probability that they will again have a child with the disease is then estimated at less than 1 percent.
Such effects can relate to birthweight, congenital disorders, life expectancy, and psychological outcomes. [2] A 2017 review found that while severe health effects are associated with higher paternal age, the total increase in problems caused by paternal age is low. [ 3 ]
Nearly 90% of adults over age 20 in the U.S. are at risk of developing heart disease, ... Researchers identified people at high risk using a recently defined syndrome that takes into account the ...
The prognosis of trisomy X is broadly good, with adult independence most often achieved, if delayed. Most adults achieve normal life outcomes, pursuing education, employment, or homemaking. [40] Childhood and adolescence, particularly in compulsory education, tends to be more difficult for those with trisomy X than adult life.
A new study finds that 9 out of 10 adults in the U.S. may have cardiovascular-kidney-metabolic (CKM) syndrome. The research found 90% of adults qualify for stage 1 or higher of this condition.