Breastfeeding: Prevalence and Trends

This topic concerns how breastfeeding is defined, measured, and tracked across populations and over time. It covers standardised feeding indicators (such as early initiation, exclusive breastfeeding under six months, and continued breastfeeding), the global and regional patterns they reveal, and the social and policy factors that shape how prevalence changes.

Definition

Breastfeeding prevalence is the proportion of infants or young children in a population receiving breast milk, classified by standardised practice categories (for example exclusive breastfeeding under six months or continued breastfeeding at one and two years) and measured through population surveys using agreed indicators.

Scope

The entry treats breastfeeding as a population indicator: how it is categorised (ever, exclusive, predominant, continued), how prevalence is estimated from surveys, and how rates differ by country income and over time. It summarises descriptive epidemiology and the evidence base linking breastfeeding to outcomes; it does not give individual feeding instructions.

Core questions

• How are breastfeeding practices defined and categorised for measurement?
• What are the global and regional levels and trends in exclusive and continued breastfeeding?
• How is breastfeeding prevalence estimated from household surveys?
• What population-level factors are associated with higher or lower breastfeeding rates?

Key concepts

• Exclusive breastfeeding
• Early initiation of breastfeeding
• Continued breastfeeding
• Standardised IYCF indicators
• Recall-based survey measurement
• Income-related gradients in prevalence

Mechanisms

At the measurement level, breastfeeding prevalence is most often estimated from a mother's report of what an infant consumed in the previous 24 hours, which classifies the child into exclusive, predominant, partial, or no breastfeeding categories; aggregating these reports across a survey sample yields population estimates. Because the 24-hour recall captures current rather than lifetime practice, indicators are defined for specific age windows so that levels and trends are comparable across surveys and countries (WHO & UNICEF, 2021; Victora et al., 2016).

Clinical relevance

Breastfeeding indicators describe population infant-feeding patterns and are used to monitor progress toward public health targets and to identify groups with low coverage. The topic is descriptive and reference-oriented; it characterises evidence and surveillance and is not a source of individual feeding advice.

Epidemiology

Globally, exclusive breastfeeding in the first six months and continued breastfeeding into the second year fall well short of recommended levels, and patterns differ by country income: in many high-income settings prevalence is comparatively low and socially patterned, whereas continued breastfeeding tends to be higher in lower-income settings (Victora et al., 2016). Trends over time have shown gradual gains in some indicators but persistent gaps overall.

Evidence & guidelines

Standardised definitions and measurement methods for infant and young child feeding indicators are set out by WHO and UNICEF (WHO & UNICEF, 2021), and the global framing for promotion and support comes from the Global Strategy for Infant and Young Child Feeding (WHO & UNICEF, 2003). The Lancet breastfeeding series synthesises prevalence and associated outcomes (Victora et al., 2016), and the PROBIT trial provides experimental evidence that breastfeeding promotion can raise exclusivity and duration (Kramer et al., 2001).

History

Comparable measurement of breastfeeding became possible as international household surveys (such as the Demographic and Health Surveys and UNICEF's Multiple Indicator Cluster Surveys) adopted standard feeding questions and as WHO and UNICEF codified indicator definitions; the cluster-randomised PROBIT trial in the late 1990s and the 2016 Lancet series then strengthened the evidence linking breastfeeding promotion and practice to outcomes (Kramer et al., 2001; Victora et al., 2016).

Debates

How accurately do surveys capture exclusive breastfeeding?

Because the standard indicator relies on a single 24-hour recall, it can overstate exclusivity relative to practice over the whole period since birth, so comparisons over time and place depend on consistent definitions.

Key figures

• Cesar G. Victora
• Michael S. Kramer
• Nigel C. Rollins

Seminal works

• victora-2016
• kramer-2001

Frequently asked questions

What does 'exclusive breastfeeding' mean as an indicator?

It means the infant received only breast milk (with allowed exceptions such as medicines or oral rehydration solution) and no other food or drink, usually measured for infants under six months using a 24-hour recall.

Why do breastfeeding rates differ so much between countries?

Prevalence reflects social, economic, employment, marketing, and health-system factors, and patterns vary by country income; this topic describes those population differences rather than prescribing practice.