The duration of exclusive breastfeeding is often hindered by physical challenges such as pain, clogged ducts, and low milk flow. Despite efforts from educational programs and health care benefits, barriers persist, leading to only 17% of infants being exclusively breastfed for the recommended six months. While clinical research has provided insights into breast milk properties and biomechanics to alleviate these challenges, understanding the underlying fluid mechanics of breastfeeding remains limited. We initially proposed an integrative study that included experimental and numerical techniques to address this gap. By collecting and analyzing breastmilk samples consistently since the infant’s birth, we sought to measure a dozen relevant rheological and fluid properties to inform 3D models and conduct controlled experiments using milk simulants.