disorder, also known as a congenital disease, deformity, birth defect,
or anomaly, is a condition existing at or before birth regardless of cause.
Birth defects may be the result of genetic or environmental factors. Genetic
disorders or diseases are all congenital, though they may not be expressed or
recognized until later in life. Genetic diseases may be divided into
single-gene defects, multiple-gene disorders, or chromosomal defects. This
includes errors of morphogenesis, infection, epigenetic
modifications on a parental germline, or a chromosomal abnormality.
Birth defects are present in about 3% of newborns in USA. Congenital anomalies
resulted in about 632,000 deaths per year in 2013 down from 751,000 in 1990. The type with the greatest numbers of deaths
heart disease (323,000), followed by neural tube defects (69,000).
disruptor, the DDT was shown to induce miscarriages, interfere with the
development of the female reproductive system, cause the congenital
hypothyroidism and susceptibly childhood obesity. Congenital anomalies
resulted in about 632,000 deaths per year in 2013 down from 751,000 in 1990.