Quantified Baby products are a new area for the application of Quantified Self. Such products primarily focus on measuring infant's body data and vital signals. Our Baby Lucent system is a prediction of how Quantified Baby products may evolve in the near future and illustrates what dilemmas designers ought to overcome when devices are being designed to measure the body data of those that cannot decide for themselves. We intend to raise these questions and propose three design qualities that all Quantified Baby products should avoid: raising parental anxiety; inhibiting parental intuition; increasing distance between parent and child.