There are six main stages of the human life cycle, during which a human is a fetus, baby, child, adolescent, adult and elderly person. The exact age for entering each stage varies, but all healthy humans follow the same ... More »

The human life cycle begins at fertilization, then birth, and progresses through infancy, childhood, puberty, adulthood and aging, ending in death. Every stage is unique and encompasses changes in the human body. More »

There are many different versions of the human stages of life, but most explanations include baby or infant, toddler, child, adolescent, adult, and mature adult. Each stage encompasses an age range. Some resources, such ... More »

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There are many different versions of the human stages of life, but most explanations include baby or infant, toddler, child, adolescent, adult, and mature adult. Each stage encompasses an age range. Some resources, such ... More »

www.reference.com Science Biology

Mammal life cycles vary based on the species, but mammalian life cycles share the same fundamental infancy, adolescent and adult stages. Mammals begin as an egg cell fertilized by a sperm cell. Mammalian young are born a... More »

A life cycle includes the various stages in the life of a living thing, including its birth, growth, aging and death. For instance, a butterfly's life cycle chart starts with an egg, moves on to a caterpillar, then a coc... More »

The stages that make up the life cycle of a killer whale are baby, adolescent and adult. Males typically live for about 30 years, and females typically live about 50 years. More »