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Week 38: Baby develops a firm grasp. Thirty-eight weeks into your pregnancy, or 36 weeks after conception, your baby is developing a firm grasp. Your baby's toenails have reached the tips of his or her toes. His or her brain might weigh about 14 ounces (400 grams). After birth, your baby's brain will continue to grow.
Between ages 2 to 10 years, a child will grow at a steady pace. A final growth spurt begins at the start of puberty, sometime between ages 9 to 15. The child's nutrient needs correspond with these changes in growth rates. An infant needs more calories in relation to size than a preschooler or school-age child needs. Nutrient needs increase again as a child gets close to adolescence. A healthy child will follow an individual growth curve.