The Demographic Transition Model suggests that once a country reaches the final stage, it will experience a consistent decline in both birth and death rates indefinitely.

The Demographic Transition Model (DTM) explains how a country's population changes as it develops economically. In the final stage of this model, both birth and death rates are low, leading to a stable population. This means that people are having fewer children, and fewer people are dying, which keeps the population from growing rapidly. For example, in countries like Germany or Japan, we see low birth rates because many families choose to have fewer kids, while healthcare improvements keep death rates low. However, while the model suggests stability, it doesn't mean that birth and death rates will decline indefinitely; they may fluctuate based on social, economic, and cultural factors.