Access Etude Longitudinale Française depuis l’Enfance data


Elfe is the first large birth cohort study in France: 18 329 children and their families participated when the cohort members were born, in 2011. To better understand how children’s environment affects their development, their health and their socialisation, this study plans to follow these children over twenty years.

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Request access to the data

To request access to the data
, please pre-register using this pre-register form.

Any public or private research unit can access the data, by following the data request guidelines (Updated on 15/11/2021).

Already registered? To request data, click here and follow the instructions we’ve sent you.

Learn about the past waves and the data

Find information about the past waves of Elfe here.

• Variables are listed in this interactive application.

  More general information about Elfe can be found at

More useful resources

Description of the biological data

List of constructed variables (EQR) appended to the Elfe datasets

Contextual datasets matched with Elfe data

Programmes and methodological notes in open access


Elfe is part of the REcherche sur les COhortes d’enfants suivis depuis la NAIssance (RE-CO-NAI) project*, funded by Investissement d’Avenir and France 2030  

* RE-CO-NAI has a second cohort study, Etude épidémiologique sur les petits âges gestationnels (Epipage 2):


CADE schedule


The next Comité d’Accès aux Données Elfe (CADE) is on:

Friday, March 8th, 2024
(deadline for data requests: 23/02/2024)

Check out the next dates.