Developmental Programming · what the womb writes for decades发育编程 · 子宫写下的几十年

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子宫里的营养环境给孩子设一套用几十年的默认档 · 荷兰饥荒的自然实验 · 关键窗口错过难补 · 关联不等于因果

More than growing a baby

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不只是把孩子养大

Pregnancy nutrition is usually framed as growing the baby — eat more, grow bigger. But it is quietly doing something else: setting a default configuration the child will run on for decades. The field is called developmental programming: during critical windows, the nutritional environment tunes the child's future metabolic, vascular, and nervous systems.

The first clue came from the British physician Barker. Tracking over 5,000 men in Hertfordshire, he found that the lighter the weight at one year of age, the more likely a person was to die of ischaemic heart disease as an adult — the standardized mortality ratio fell stepwise from 111 in the lightest group to 42 in the heaviest (Barker 1989).

To be clear up front, so this does not read as fear: this is an association (observational research), not 'if you fall short of X, your child will get sick'. The causal mechanism behind it is mostly inferred from animal experiments (Gluckman & Hanson review, New England Journal of Medicine 2008). Over the next screens we cover both how real this programming is and where its evidence stops.

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