Long-term effects on offspring of intrauterine exposure to deficits in nutrition.

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Abstract
The number of cell divisions during embryonic and fetal life makes the embryo/fetus particularly vulnerable to effects resulting from exposure to an adverse intrauterine environment. Exposure to drugs and irradiation at this stage of development are able to cause congenital malformations and various cancers in later life. In-utero exposure to hyperglycaemia is able to lead to future diabetes that is heritable, but not genetic in origin. Fetal malnutrition causing growth restriction is able to lead to an increased risk of developing type 2 diabetes, hypertension and ischaemic heart disease in later life, especially if the growth restriction is followed by catch-up growth postnatally. This review discusses the various mechanisms by which these effects may occur, and presents the difficulties that will have to be faced if their world-wide health burdens are to be reduced.

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