Pronatalism Australia

Tools

Interactive Tools

Fertility Tools

Explore the demographic data for yourself. These interactive tools let you model fertility scenarios and compare generational change across your own social network.

Interactive Tool

Generational Replacement Impact Simulator

Explore how Total Fertility Rate trajectories influence long-term generational stability. Adjust the TFR slider or select a country benchmark to see projected outcomes.

Projection Timeframe
Total Fertility Rate (TFR) 1.64
0.5 Replacement Level (~2.1) 4.2
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*The chart displays the long-term generational change in population size based purely on the selected TFR, assuming a constant age structure.

Benchmark: Country Scenarios (Sorted by TFR)
Benchmark: Regional Scenarios

Methodology & Assumptions

1. Population Momentum & Structure

This simulator uses a simple Generational Replacement Model which assumes a stable population age structure and constant mortality rates. This simplifies the effect of fertility over a generation (~30 years). In real populations, past fertility changes create “population momentum,” meaning actual population figures will grow more slowly or decline more slowly than shown here. This tool isolates the long-term TFR impact once momentum is spent.

2. Dynamic vs. Constant Rates

The projection assumes the selected Total Fertility Rate remains constant for the duration of the simulation. Demographic reality is dynamic; fertility rates rarely stay static. If TFR continues to trend downward over time, the actual population decline will be more substantial than simulated here. Conversely, successful policy interventions could reverse trends and lessen the decline.

Data Sources:

Interactive Tool

Generational Fertility Comparison

How has fertility changed from one generation to the next? Compare how many children your peers are having versus their parents to see how fertile your social network really is.

For each adult friend who has had children, enter:
  • How many siblings they have
  • How many children they have
Only include friends where you know both answers.
# Siblings Children
0 friends

Intergenerational Fertility

Each line traces a friend from their parents’ family size (left) to their own (right).

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Add friends above to see the comparison chart.

How It Works

This tool estimates intergenerational fertility change by comparing your friend’s number of children to the size of the family they grew up in. The “parents’ generation” figure is calculated as siblings + 1 (i.e. the total children their parents had). The difference reveals whether fertility is rising, stable, or declining across your social circle.

This is an informal comparison tool, not a demographic model. It works best with 10 or more entries and is most meaningful when you include a mix of friends from different backgrounds.

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