Introduction: breastfeeding is the optimal method of feeding infants. Breastfeeding rates in Spain are far from the World Health Organization's targets. The main objective of our study is to determine the prevalence of breastfeeding in our basic health zone in children under 2 years of age. Our secondary objectives are to determine the prevalence of breastfeeding in the first 15 days of life, at 6 months and at 1 year.

Methods: descriptive cross-sectional observational study of children aged between 0 and 24 months registered at the Los Alperchines health center in San Fernando de Henares (Madrid). A survey was conducted with a total of 123 children. The data obtained included sociodemographic variables of the mother and data on the child's diet obtained from the IHAN survey. The statistical program SPSS v26 was used to analyze the data.

Results: the prevalence of breastfeeding in our study in children under 2 years of age is 51.35%, with a 95% confidence level (44.4-62.8). 57.6% of children under 14 days old and 51% of all children under 6 months old are exclusively breastfed.

Conclusions: it is necessary to work globally to meet WHO objectives by adopting measures that promote and maintain breastfeeding. Initiatives such as the IHAN project for health centers must have the support and recognition of health authorities.