DOHaD improved

What life stages does DOHaD focus on?

Prenatal, perinatal, and early postnatal periods

What does DOHaD link the environment to?

Chronic disease risk later in life.

What is the Barker Hypothesis?

Fetal/early-life conditions can influence adult disease risk.

What disease was Barker especially studying?

Ischemic heart disease/cardiovascular disease.

What did Barker link low birth weight to?

Higher risk of heart disease later in life.

What was Barker’s fetal nutrient-diversion idea?

The fetus protects the brain, but other organs like the heart may develop weaker.

What is fetal programming?

Early development is “programmed” by environmental conditions, affecting later health.

What are key developmental windows?

Preconception, gestation, infancy, childhood/puberty, pregnancy, adulthood, aging, and future generations.

Why are developmental windows important?

Exposures during sensitive periods can have stronger long-term effects.

What does “prevention should begin before birth” mean?

Protecting health starts during pregnancy or even before conception.

What is developmental plasticity?

The ability of an organism to adapt to environmental cues during development.

What are predictive adaptive responses?

Developmental changes made in response to early cues that “predict” the future environment.

What is the mismatch hypothesis?

When early-life adaptations don’t match the later environment, disease risk can increase

Example of developmental mismatch?

Fetus develops in low nutrition, then grows up in a high-calorie environment

What is the “thrifty phenotype”?

A body programmed to conserve energy after early undernutrition, which can raise obesity/diabetes risk later.

What are major mechanisms of developmental plasticity?

Epigenetic regulation, hormonal programming, and microbiome influences.

How does epigenetic regulation affect DOHaD?

It changes gene expression without changing the DNA sequence.

What is hormonal programming?

Early hormone signals can shape metabolism, growth, and later disease risk

How can the microbiome affect development?

Early gut microbes can influence immunity, metabolism, and health.

What environmental exposures matter in DOHaD?

Chemicals, EDCs, toxic metals, nutrition, stress, and psychosocial factors.

What are EDCs?

Endocrine-disrupting chemicals that interfere with hormone signaling.

How can maternal stress affect offspring?

It can program the HPA axis and affect mental/metabolic health.

What are glucocorticoids?

Stress hormones, such as cortisol, that can influence fetal development.

What adult diseases are linked to DOHaD?

Obesity, type 2 diabetes, fatty liver disease, cardiovascular disease, respiratory disease, cancers, and neurodevelopmental outcomes

Why does DOHaD matter for public health?

Early prevention can reduce lifelong disease risk.