A new study has pointed out that even as babies, arguments between parents can affect emotional development in childhood and can also change the way babies process the tone of voice.

“Even during sleep, infants showed distinct patterns of brain activity depending on the emotional tone of voice we presented,” researchers said.
The researchers said that infants who belong to homes where there is increased conflict portrayed greater reactivity to an angry tone of voice in brain areas connected to stress and regulation of emotions.
Source-Medindia