2Daniely M, Aviram A, Carp HJ, et al. The association between sporadic somatic parenta aneuploidy and chromosomally abnormal placentae habitual aborlions[J]. Early Pregnancy 2001,5(3):153.
3Stephenson MD, Awartani KA, Robinson WP. Cytogenetic analysis of miscarriages from couple with recurrent miscarriage: a casecontrol study[J]. Hum Reprod, 2002, 17(2) :446.