As I mentioned below, the sensors attached to Will help to track his vital signs. Another measure of his progress is his weight. Here is the scale readout we see each day when we come in to visit him. His weight is measured in grams. He was 522 at birth, bulked up to 526 on day 2, then lost weight for a couple of days. We reminded him that he didn't really need to diet, and he responded by gaining some of it back the past two days. He is now back above one pound at 480 grams.