In fact, babies only get dha from breast milk.
Dha is docosahexaenoic acid. There are formulas that contain docosahexaenoic acid single-cell oil (dhasco), which is similar, but not exact in composition to dha. Both work similarly to stimulate development of the brain and retina
in infants, though concentrations of true dha in the breast milk of pregnant women who eat fish regularly are quite high.