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Period: to
Zygote
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Period: to
Embryo
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4 week old embryo: Heart beats, Eyes and ears form.
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8 week old embryo: Heart develops right + left chambers.
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Period: to
Fetus
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4 to 6 month old fetus: Bones are visible. Heartbeat heard.
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6 month old fetus: Fingerprints form.
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6 to 9 month old fetus: Eyelids can open, weight up to 6.6 lbs.
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This is when I started to hold my head up. I am still very small. I am about 3 months old.
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This was at my first birthday. I lived in Maryland then. I still like cake and frosting!
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Period: to
Infancy
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3 months old: A baby's head is up and can reach.
A baby can hold its head up and reach for objects. -
7 months old: Infant begins to crawl.
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This is when I started to sit up. I was bigger than before. I am about 7 months old.
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First Birthday
This was at my first birthday. I lived in Maryland then. I still like cake and frosting! -
This is after I started to walk. I am at the pool. I am about 14 months.
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Period: to
Childhood
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I am starting to read here. I am about 4 years old. I moved to North Carolina when I was 4 years old.
I am starting to read here. I am about 4 years old. I moved to North Carolina when I was 4 years old. -
Ages 9 to 15: Sperm Production begins.
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Period: to
Puberty
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Period: to
Adolescence
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Period: to
Adulthood
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Age 30: Skin starts to become wrinkled.
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Age 30: Aging begins.
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Age 45-60: Aging becomes more noticeable, progresses rapidly.