How far can the MLPA method and the DNA array method do the limit of a water chromosomal test in conquest

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When the MLPA method really used it, We needed the reagent for 5 tests for normal control, and the reagent for 5 tests was necessary for one inspection. We did not change with the DNA array method for the cost. We were not able to obtain the DNA array method so as to have expected the inspection consent of the case in the late stage of the pregnancy that We expected. Consent was provided in the case that a marker chromosome (origin ignorance accessory chromosome) was recognized by amniotic diagnosis of the second pregnancytrimester, and the origin became clear in 3 cases.