Let's look back during similar periods of expansion. Translating these numbers gives a fertility rate ranging from 2.5 to 4. One other complication in the fertility rate is how its distributed over the lifetime of a woman. In a population where women put off babies as late as possible, but have the same number of babies overall, the birth rate will be less. Very High 5 3.7 2.6 2.0 You may choose to override any of the fertility rates for any settlement by clicking on one of the blue buttons or sliding one of the red boxes of the fertility graph.
Fertility rates change over time for many different reasons and causes.
In Solarpop fertility rates are solely determined by the ratio of the population to the settlement capacity . Various points along this line can be provided as parameters. Each vertical line represents a ratio of the current population to the capacity of the settlement. The model interpolates points in between. The Fertility Rate at zero is the fertility rate of a settlement at its beginning.