To investigate the incidence of chromosomal aberrations in the Chinese popula-tion,cord blood was obtainedf rom 3,415 consecutive liveborn babies from 3 hos-pitals in the north district of Changsha between 3 May,1979 and 24 May,1982.A total of 3,415 babies including 1,718 boys and 1,696 ginls(Table 1)werekaryotyped with G-banding.The child bearing age of the paconrs ranged from 25—34 fathers accounting for 91.5% and mothers 84.2%(Table 3).Altogether 25 cases(male 16,female 9)of chromosomal aberrations were ...
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