Picture a lentil bean. Done? That’s the size of your baby. The vertebra is developing, and the area where the face will be is forming shapes that will eventually become the chin, cheeks, eyes, and nose. You still can’t hear it, but the heart, divided into both right and left chambers, is beating at the rhythm of 150 beats per minute. Kidneys and the liver also begin to take shape. Each lung exists as individual tubes and will transform into structures similar to little sacs during the next few days.