Before you were pregnant, your uterus was about the size of your fist. However, by 6 weeks of pregnancy, your uterus has grown to the size of a grapefruit! Your baby is developing at an amazing rate during these early weeks. Eyelid folds and ears are forming. Your baby's eyes are still very wide apart on the sides of her head, but will eventually center themselves out. The tip of the nose is actually present at this time as well. On ultrasound you can see that the aortic and pulmonary valves of the heart are present. The tubes that lead from the throat to lungs are branching and your baby's torso is getting longer and beginning to straighten out. Just a few weeks ago, your baby's arms were tiny buds. Now the elbows are actually present and the arms and legs extend forward and have grown longer. Fingers and toes are becoming visible also.