How do the population profile and fertility rates of developed countries differ from those of developing countries?

Developed countries typically have older population profiles with lower fertility rates, often below the replacement level of 2.1 children per woman, due to factors such as increased access to education, family planning, and economic opportunities for women. In contrast, developing countries generally have younger populations and higher fertility rates, often exceeding replacement levels, driven by limited access to education and healthcare, cultural norms favoring larger families, and higher child mortality rates. These differences contribute to varying demographic challenges and economic growth potentials in each group of countries.