week 10 update

Baby's Officially a Fetus!

Call it baby's first real graduation day: At the end of this week, your baby will officially become a fetus, a title bestowed now that he's completed the most vital building-block steps in his development. No longer a little embryo, your little guy is poised for a serious growth spurt since his kidneys, intestines, brain, and lungs are all in place. Your baby's fingers and toes (which started out slightly webbed together) will separate into their tiny 10 fingers and 10 toes this week. The bones that make up the skeleton will also begin to harden. And (genius in the making!) baby's brain is producing 250,000 neurons every minute! More developments: Your baby's eyelids are no longer transparent, and his kidneys are starting to produce urine. Tooth buds (the precursors to his actual pearly whites) are forming now. Because he's all curled up in the eponymous fetal position, it's hard to get an exact assessment of his height. That's why experts use the crown-rump measurement -- the distance from the top of his head to the bottom of his bum. Right now your baby's crown-to-rump length is about 2-1/2 inches and he weighs about half an ounce.