It's not correct that these charts are based on bottle-fed babies, or that they come from the US.

But her bottle-fed baby still, at the age of one year, could barely sit up - and weighed 30 to 40 pounds.

By contrast, bottle-fed babies don't expend nearly as much effort, and their blood pressure doesn't go up as much.

Water is extracted for drinking purposes from many of our lowland rivers, and high nitrate levels in drinking-water can lead to illness in bottle-fed babies.

If all the factors in breast milk were important," he said, "we should be seeing an epidemic of illnesses among bottle-fed babies.

Breast-fed babies also tend to be more active, and some studies have found that they crawl and walk earlier than bottle-fed babies.

Being a bottle-fed baby.

How can I wean my bottle-fed baby?

Are there differences between breast- and bottle-fed babies?

Three years later, he was a co-author of a study determining that bottle-fed premature babies needed dietary supplements of the amino acid cystine.