---
title: "Replacement-Level Fertility: The 2.1 Benchmark"
description: "Replacement-level fertility is the 2.1 births-per-woman rate at which a population replaces itself. Why the figure exceeds 2, and how India crossed it in 2020."
url: "https://modeldiplomat.com/learn/glossary/replacement-level-fertility"
---

[New](https://modeldiplomat.com/)

#

Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Replacement-level fertility is the total fertility rate at which a population exactly replaces itself across generations, conventionally set at 2.
- 1 children per woman.
- Why is replacement-level fertility 2.1 rather than exactly 2.0?
- Does reaching replacement-level fertility immediately stop population growth?
- Is the 2.1 figure the same for every country?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

Replacement-level fertility is the total fertility rate at which a population exactly replaces itself across generations, conventionally set at 2.1 children per woman.

Go beyond the definition

## Research Replacement-Level Fertility like a delegate

Model Diplomat's AI drafts position papers, speeches, and country research with real sources — built for MUN and politics students.

## Research it like a delegate

Research on modeldiplomat.com

## Ask a follow-up about Replacement-Level Fertility

Open a cited briefing in Model Diplomat search — timelines, positions, and sources you can use in committee or exam answers.

[Start research on Replacement-Level Fertility](https://modeldiplomat.com/search?q=Explain%20Replacement-Level%20Fertility%20%E2%80%94%20key%20dates%2C%20actors%2C%20positions%2C%20and%20sources)

Example

India's National Family Health Survey (NFHS-5), released in 2021, recorded a national total fertility rate of 2.0, marking the first time the country fell below the 2.1 replacement level.

Keep learning

## Go deeper than the definition

[Explore all Civil Service & Diplomatic Exams lessons](https://modeldiplomat.com/learn/civil-services)[Test yourself with a quiz](https://modeldiplomat.com/learn/glossary/quiz/civil-services)

## Take Replacement-Level Fertility beyond the glossary

Ask the AI research engine built for diplomacy — get briefings, position papers, and speeches with sources you can cite in committee.