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All newborns should be similar size in ideal conditions

International growth charts that say the size of babies born to well-fed mothers is similar no matter her ethnicity are causing consternation

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BABIES come in all shapes and sizes – or so you might imagine. According to new international growth charts, all newborns should be broadly the same size, regardless of ethnicity or their mother’s size. Nutrition and health are the only factors that make a difference.

Standardised charts already exist for a child’s growth from birth to age 5, but until now, there was no internationally agreed equivalent for fetal development.

The pooled data from thousands of healthy, well-fed mothers from the US, UK, India, China, Brazil, Oman, Kenya and Italy. Each had regular measurements made of their fetus and newborn baby. These were then used to plot standard growth charts for fetuses in ideal conditions.

Provided the mother is healthy, “all babies grow in a similar way and achieve a similar size at birth”, says at the University of Oxford, who led some of the research (The Lancet, , ).

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