The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state.
Most babies take their first steps sometime between 9 and 12 months and are walking well by the time they're 14 or 15 months old. Don't worry if your child takes a little longer, though. Some perfectly normal children don't walk until they're 16 or 17 months old.
These typical ages are just a guideline. Some children walk at eight months, while others may not walk until they're 18 months. See ways to encourage your baby to walk in our milestones article. If you're concerned about your child's walking progress, speak to your health visitor.sk for help if ... your toddler isn't walking by 14 months or 15 months, you could mention it to your health visitor or doctor if you have concerns. But be reassured that it's still well within the normal range of development.