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对不明原因的245对自然而产夫妇进行外周血淋巴细胞染色体分析，检出染色体畸变13例，正常多态变异的9号臂间倒位4例。
Chromosome analysis of peripheral blood lymphocytes was performed in 245 unexplained couples with natural births. Chromosome aberrations were detected in 13 cases and normal polymorphic variants in 9 cases.