Go, baby, go! Your talented child has doubled in size in the past two weeks, and is now approximately three-quarters of an inch long. Body parts that formed in the first few weeks are growing more complex and specialized, including the eyes, limbs, mouth, heart, and brain. Fingers and toes are taking shape, along with the palate and pituitary gland. The eyelids are also forming--until they're complete, the eyes appear open.