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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.
From the age of 2 until you reach puberty, you grow at a rate of about 2.5 inches per year, and boys and girls share similar physical characteristics. But at around age 11 for girls and age 13 for boys, you undergo a pubertal growth spurt that lasts for about two years.