14 Weeks
Welcome to the second trimester! This week's big developments: Your baby
can now squint, frown, grimace, pee, and possibly suck his thumb. Thanks to
brain impulses, his facial muscles are getting a workout as his tiny features form one
expression after another. His kidneys are producing urine, which he releases
into the amniotic fluid around him -- a process he'll keep up until birth. He
can grasp, too, and if you're...
