The sma gene screening test usually costs between $400 and $500, and the exact price is related to the hospitals in different places. Currently there is no standardized cost for sma gene screening in China, for sma (spinal muscular atrophy) gene screening is a kind of prenatal genetic examination. Abnormalities in the sma gene can cause spinal muscular atrophy, which is relatively common in China, belonging to an autosomal hereditary disease, the general cost of the examination needs 400 yuan to 500 yuan, the specific price is related to different places and different hospitals. The spinal muscular atrophy caused by abnormalities in the sma gene has a greater danger, so it is recommended that women go to regular hospitals to actively receive prenatal examination.