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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.
Learning and Development: Infants Birth to 12 Months. Babies grow and develop faster in the first year than any other year. During the first six months of life, babies gradually gain information about the world around them. Babies younger than six months depend mainly on their caregivers for their daily experiences.