[Advances on prenatal diagnosis of birth defects associated with genetic disorders].

Birth defects have become a major public health concern in the world, which can be resulted from the harmful environmental factors, genetic mutations or their co-effects. Prenatal diagnosis or preimplantation diagnosis has been considered as the only effective way for the prevention of the birth of those defects. Besides karyotype analysis and fluorescence hybridization, chromosomal microarray analysis and next generation sequencing or its derivatives are in common use. This article reviews the advances of the newly emerging molecular techniques in prenatal diagnosis of birth defects associated with genetic disorders.