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Most fourteen-month-old babies may have begun walking. Genetic factors have a strong influence; some healthy babies may not yet be walking at fourteen months.
A fourteen-month-old born at term usually weighs 10–11 kilograms and measures 75–80 centimeters in length. Head circumference may measure 47, 48 or 49 centimeters depending on the family's head characteristics. Much of physical development is familial.
At this stage the baby can say a few words with understanding. Occasionally, they may begin to say two words together. Family factors are important in both physical growth and stages of maturation; knowing what the parents could do at fourteen months is important when assessing the baby.
A fourteen-month-old may walk more skillfully and take a few steps without difficulty after letting go of a parent's hand. The baby becomes interested in climbing stairs; crawling up stairs in particular may begin in the fourteenth or fifteenth month.
