Main content
    • Who are we ?
      • The team
      • Associated researchers
      • Oversight
      • International partnerships
    • Background to the study
    • Study goals
    • Main research themes
      • Social sciences
      • Health
      • Environment
      • Cross-cutting research
    • How does it work? >
      • Key stages
      • Participants
      • Pilot study
      • Data security & ethics
    • Our partners
    • Social sciences
      • Children's experience of the first lockdown in France
      • Early language socialisation
      • Role of grandparents after a birth
      • Growing up in a family of immigrant origin in France
      • Caring and sharing: who looks after baby?
      • Socioeconomic inequalities in language and motor development
      • Becoming the parents of a boy or girl
      • Low birth weight and socioeconomic characteristics
      • Preparing for the birth: what choices, what influences?
      • Children's games: a reflection of their socialisation?
      • The math performance gap between girls and boys is non-existent before the first year of primary school
      • Boys' or girls' games? The role of siblings!
      • Early schooling at age 2 narrow the gaps in child development?
      • Children with special educational needs
    • Health
      • Sleep habits and sleep characteristics at age one year in the ELFE birth cohort study
      • European LifeCycle Project: a network of cohorts totalling 250,000 children to improve public health
      • Elfe participe à la construction des nouvelles courbes de croissance du périmètre crânien
      • Respiratory symptoms at 2 months and 1 year
      • BCG vaccination before 3 months
      • Early prenatal interview and antenatal education
      • Tobacco and alcohol use during pregnancy in France: The role of migrant status
      • Psychological distress and access to mental healthcare during pregnancy
      • Infant feeding practices and sleep
      • Neurodevelopment of children: mothers' diet during pregnancy under the microscope
      • Allergy risk: the importance of not diversifying infant diets too late
      • Paternity leave and fathers' mental health
      • The microbiota of toddlers under the microscope!
      • Accidents of everyday life from 1 to 10.5 years old
      • Ophthalmological impairments at five and a half years after preterm birth
    • Environment
      • Levels of pyrethroid pesticides in pregnant women
      • Analysis of pesticides in hair samples from pregnant women
      • Absorption of environmental pollutants during pregnancy
      • Dietary exposure to pesticide residues
      • Exposure to microorganisms in the home
      • Impact of occupational exposure to solvents during pregnancy on fetal growth
    • Cross-cutting research
      • Infant formula : social and health related factors
      • Determinants of dietary diversification
      • Duration of breastfeeding in France
      • Breastfeeding practices
      • Children's health and inequalities: a report by the Cour des Comptes documented by data from the Elfe study
      • Children's exposure to screens: are families following the recommendations?
      • L'influence de la fratrie sur le développement du langage des enfants à 2 ans
    • 10 years & 10 research advances
    • Publications
      • Academic journals
      • Reports & working documents
      • Popular science articles
      • Theses
    • Research projects
      • Social sciences
      • Health
      • Environment
      • Cross-cutting research
      • Methodology
      • International comparisons
    • Access to data & questionnaires
      • Questionnaires and other useful documents
    • Other cohorts
    • Newsletter
      • Elfe Actu Archives
      • Lettres-Elfe Archives
    • Doctor and dentist survey
      • espace médecin
      • Espace chirurgien-dentiste - enquête santé Elfe
    • Survey at 10½ years
      • Biological part
    • School surveys
      • Survey in Year 4 of primary school
      • First-year primary school survey
      • Survey at nursery school
      • Stakeholders
    • Covid-19 survey
    • Agenda
      • Enquête en ligne à 11 ou 12 ans
      • Pilot survey on teenage years
      • Survey at 14 years old - teenagers
      • Survey at 14 years - parents
    • Lettres d’information
      • newsletter 6
    • Le coin des enfants >
      • C’est quoi Elfe ?
      • Graine d'Elfe - Journal d'information
      • Boîte à jeux
      • Mon expérience Elfe - Concours Elfe artiste
    • En coulisses >
      • From construction to a survey
      • Témoignages de familles
      • Parents Ambassadeurs
    • Le saviez-vous ?
      • happy new year
    • Family rights and data security
      • Confidentialité des données
      • RIGHTS OF PARTICIPANTS
    • FAQ
    • Press releases
      • Document library
      • password
    • Videos >
      • Webinars for families
      • What the researchers have to say
      • Institutional films
    • Information leaflets
    • Serious games questionnaires
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  1. French Longitudinal Study of Children
  2. Survey section
  3. Survey at 10½ years
  4. Biological part
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Biological part

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