Why does the infant mortality rate go down as a country becomes more developed?

As a country becomes more developed, improvements in healthcare access, nutrition, sanitation, and education significantly contribute to lower infant mortality rates. Enhanced medical facilities and skilled healthcare professionals lead to better prenatal and postnatal care, reducing complications during childbirth. Additionally, higher socioeconomic status often correlates with improved living conditions and access to essential resources, fostering healthier environments for infants. These factors collectively create a more supportive framework for child health and survival.