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Carrier screening for individuals planning a pregnancy or who are already pregnant. Screening usually involves a blood test to assess whether someone carries genes associated with conditions including cystic fibrosis, spinal muscular atrophy, hemoglobinopathies, Tay-Sachs disease, Canavan disease, familial dysautonomia, and other conditions. Talk with your clinician to determine the most appropriate tests and arrange screening. Insurance coverage varies.