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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.
The way kids grow, age by age. 1  Story Highlights. 2  Use a growth chart to see where your child falls among average children. 3  Children seem to grow fastest in the summer and slowest in the fall.  Very heavy women tend to have larger 1  babies. Breastfed babies, Hispanic and Asian-American babies tend to be smaller.  Next Article in Health Â».