No, Down syndrome is not a sex linked trait therefore neither gender has a highe risk
That would mean that the mother is the one with Down syndrome, since men with Down syndrome are sterile. There is a 50% chance that the child will have Down syndrome and 50% chance that child will be born without.
No. Parents who have a child with Down syndrome do not have an increased chance in having another child with Down syndrome. Everyone has the same chance of having a child with Down syndrome, 1%.
No. It happens by chance.
No, there is a 30-40% chance of Down Syndrome when duodenal atresia is diagnosed.
no because since they both have down syndrome, they will have 100 percent that they will have a down syndrome baby
Yes, Down's Syndrome does not affect the ability to have children. Men with Down's Syndrome can father children in very rare circumstances, women with Down's Syndrome have about 50% chance of miscarriage.
Down syndrome is slightly more common among males with most studies showing about 106 to 125 boys for every 100 girls. In some studies younger mothers, who have a lower total chance of having a baby with Down's syndrome, have a more skewed male:female ratio when they do (as high as 173 boys for every 100 girls). No one is sure why boy are affected more often.
Older women who give birth have a much higher chance of having a baby with Down syndrome than do other women.
That depends. Men with Down syndrome have been shown to be sterile, while women with Down syndrome are capable of carrying a child, with 50% likelihood that the child will be born with Down syndrome.
As the disease is genetic, DS women have nearly a 50% chance of passing on DS to their offspring if the father does not have DS.
I read its around 1 in 700 - 800 births.
Pregnancy screenings for Down syndrome have a 5-8% false positive rate (test comes back positive, but the baby does not have Down syndrome) and a 35-40% false negative rate (test is negative, but baby has Down syndrome). This is due to a number of different factors that the screening depends on, such as the mother's age and weight, the age of the fetus, etc. Since the tests results come back as risk factors- the chance that the baby will have Down syndrome, for example 1 out of 270- and there is usually an arbitrary cutoff, such as 1 in 250, where the test counts as a "positive", this is why sometimes it is not correct. The "positive" or "negative" depends on chance, and obviously a high chance the fetus has Down syndrome does not necessarily mean it does have it.