The bone slowly untwists with new straight growth. Usually the twist is gone by school age. This is called femoral anteversion. It usually corrects itself, more slowly, by age nine or ten. In a few children this doesn't correct fully and these are the people who walk pigeon-toed as adults.
Some children have feet that are curved in.
This is called metatarsus adductus. Most of these children also get better without treatment, but for those few children who have very curved feet, some bracing or special shoes may help in the first couple of years of life. These bone twisting conditions cannot be fixed with braces, shoe inserts or special shoes. These were used in the past, but it has been discovered that the bones correct themselves. The braces or shoes were not needed.