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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 the ages of 4 and 7 months, your baby will probably gain around 1 and a half to 2 pounds per months. This rate typically slows a bit around 6 months of age, to between 1 and 1 and a quarter pounds per month. By 8 months old, your baby will probably weigh around 2 and a half times what she weighted at birth.