While breastfeeding has many benefits for a parent and their baby, it has one major drawback: It’s incredibly difficult to know how much milk the baby is consuming.

To take the guesswork out of breastfeeding, an interdisciplinary team of engineers, neonatologists and pediatricians at Northwestern University has developed a new wearable device that can provide clinical-grade, continuous monitoring of breast milk consumption.

The unobtrusive device softly and comfortably wraps around the breast of a nursing parent during breastfeeding and wirelessly transmits data to a smartphone or tablet. Parents can then view a live graphical display of how much milk their baby has consumed in real time.