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How can socioeconomic conditions influence average height in a population?

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Fetal growth — human development Growth of the human fetus from the fourth month to the ninth month of pregnancy.

Socioeconomic conditions significantly influence the average height of a population by determining access to essential resources required for physical growth and human development.

While genetics play a primary role in determining an individual's stature, environmental factors—specifically nutrition, health care, and living conditions—act as the primary drivers of height variation across populations.1

Resource Access: Populations with greater socioeconomic equality typically enjoy better access to high-quality nutrition, including sufficient protein, calories, and essential minerals like calcium and zinc, which are vital for bone formation.1
Health and Disease: Access to medical care and sanitary living conditions prevents chronic illnesses and infections that can divert energy away from growth during childhood and adolescence.12
Global Trends: Improvements in these conditions since the 19th century have led to a global increase in average height. Conversely, in regions where poverty, poor nutrition, and high disease burdens persist, average height has seen little to no increase, as these populations remain unable to reach their full genetic height potential.1