Lifestage

{
  "id": "MLC-T-ENV-015718",
  "term": "Lifestage",
  "field": "Environment",
  "definition": "1. A distinguishable time frame in an individual's life characterized by unique and relatively stable behavioral and/or physiological characteristics that are associated with development and growth. For example, childhood is a sequence of lifestages, from conception through fetal development, infancy, and adolescence, and as such, EPA guidance recommends the use of the following childhood age groups: Age groups less than 12 months old include: birth to <1 month, 1 to <3 months, 3 to <6 months, and 6 to <12 months. Age groups greater than 12 months old include: 1 to <2 years, 2 to <3 years, 3 to <6 years, 6 to <11 years, 11 to <16 years, and 16 to <21 years. Other lifestages that may be important to consider when assessing human exposure and risk including: pregnancy; nursing; and old age.\n\n2. A distinguishable time frame in an individual's life characterized by unique and relatively stable behavioral and/or physiological characteristics that are associated with development and growth.",
  "subject": "Health and safety",
  "references": [
    "Risk Assessment Glossary",
    "Exposure Factors Handbook: Glossary; Children's Environmental Health Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/lifestage/"
}