Congenital malformations are worldwide occurrences, they know no
national borders, do not distinguish between races, ethnicities,
rich or poor. These severe physical abnormalities, present at
birth, happen more often than is usually realized, once in every 33
births. They strike every part of the body, limbs, head, heart, and
all others.
The most frequent of them all are the many types of
malformations of the cardiovascular system, the heart and its blood
vessels, which happen in about once in every 250 births. Study of
these conditions during the twentieth century took many forms,
revolving about examination and analysis of their causes, genetic,
nongenetic, and complex. To aid in unraveling the complexities of
this causation, various influences on their frequency are
considered, among them social conditions, maternal health,
birthweight, newborn maturity. And of course the known and possible
environmental bases of their occurrence are fully described.
The relation of infant death to cardiovascular malformation is
noted; and puzzlement that the level of such deaths had not kept
pace with the reduction of infant death itself and of that
associated with other kinds of malformations during this
period.
An introductory record of the history of perinatal mortality in
the last three centuries gives foundation for the discussion of
death in contemporary decades.
General
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