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Write a note in 150 words:
Foetal origin of adult diseases and contribution of David Barker.

This question was previously asked in
UPSC CSE 2025 (Prelims) CSAT Official Paper (25-May-2025)

The Foetal Origin of Adult Diseases (FOAD), also known as the Barker Hypothesis, proposes that adverse conditions experienced during fetal development and early infancy can 'program' an individual's physiology. This programming significantly increases susceptibility to chronic non-communicable diseases later in adulthood.

David Barker was the pioneering epidemiologist who, through meticulous research primarily in Hertfordshire, UK, first systematically identified this crucial link. His studies demonstrated a strong correlation between low birth weight – an indicator of poor intrauterine growth or nutritional stress – and a significantly elevated risk of developing conditions like cardiovascular disease, type 2 diabetes, and hypertension in later life.

Barker's groundbreaking work revolutionized medical and anthropological understandings of health. It highlighted that adult disease risk isn't solely determined by genetics or adult lifestyle choices, but is profoundly influenced by the very earliest developmental stages. This concept has profound implications for public health, maternal-child nutrition policies, and emphasizes the crucial biocultural interplay in human health.

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