What does Down Baby mean?

Down baby is trisomy 21 syndrome, down is the meaning of clinical see called trisomy 21 syndrome children. This kind of children mostly it will occur mental retardation, so in order to reduce birth defects, the country has also formulated a lot of policies, including at 16 weeks we do Down screening, the focus of screening is trisomy 21, screening is trisomy 18 and open spina bifida. Noninvasive is 21 trisomy, 18 trisomy and 13 trisomy, if a Down baby is born, it may bring a lot of burden to a family, whether economic or mental, so in order to reduce birth defects, vigorous screening is to reduce the possibility of birth of a Down baby with this chromosomal disease.