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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.
One Year Baby Milestones: Growth. Your babyâs weight has likely tripled since birth. At month 12, babies also have grown by 50% -- about 9 to 11 inches -- and their brain is about 60% of its adult size. After an incredible one-year growth spurt, your babyâs weight gain will start to slow down as her activity level increases.