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Skip to main content 4800 sand point way ne seattle wa 98105 206-987-2000, 866-987-2000 (toll-free) smaller font size normal font size larger font size clinics and programs find a doctor all clinics and programs locations medical conditions search condition conditions a-z symptoms a-z classes and community all classes community programs all events safety and wellness my good growing newsletter safety resources wellness resources research find a researcher research centers and programs about the institute ways to help donate volunteer guilds fundraising events safety and wellness > wellness resources > wellness topics for infants 0-2 years search kids health tay-sachs disease | healthy babies develop vision, movement, hearing, and other vital functions in part because enzymes clear out fatty protein and other unwanted material that can interfere with growth. But a baby with tay-sachs disease is born without one of those important enzymes, hexosaminidase a (hex a). buy cheap viagra buy viagra online buy viagra cheap buy cheap viagra cheap viagra generic viagra online viagra for sale cheap generic viagra viagra online in uk buy cheap viagra So, as those fatty proteins build up in the brain, they hurt the baby's sight, hearing, movement, and mental development. A child can only get tay-sachs by inheriting it. The genetic trait is relatively common among certain ethnic groups, such as ashkenazi jews. Tay-sachs can be detected before birth, so couples in at-risk ethnic groups who are thinking of having children may want to get a blood test to find out whether their child would be likely to have it. Who is at risk for tay-sachs? Each year, about 16 cases of tay-sachs are diagnosed in the united states. Although ashkenazi jews (jews of central and eastern european descent) are at the highest risk, it is now also prevalent in non-jewish populations, including people of french-canadian/cajun heritage. Some people carry the genetic mutation that causes tay-sachs, but do not develop the full-blown disease. Among ashkenazi jews, 1 in 27 people are carriers; in the general population, 1 in 250 people are. A child can only have tay-sachs disease if both parents are carriers of the gene. When two carriers have a child together, there's a: 50% chance that their child will be a carrier, but not have the disease 25% chance that their child will not be a carrier and not have the disease 25% chance that their child will have the disease screening couples who are considering having children - or are already expecting - can get screened for the tay-sachs gene with a simple blood test. If both the mother and father carry the tay-sachs gene, an obstetrician/gynecologist may refer the couple to a genetic counselor for more information. Prenatal diagnosis pregnant mothers can have their unborn babies tested for the hex a deficit that causes tay-sachs disease. (if the tests do not detect hex a, the infant will have tay-sachs disease. If the tests d.