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No they are not.
No.
can a 5 week fetus show on an ultrasound
the heart i beating and is kicking
They have all the characteristics of life.
At 5 weeks it's a embryo not a fetus. it just grows and can not feel, hear or is aware of anything yet.
Viruses have some characteristics of life but these are not considered living organisms as they are non cellular.
at 4-5 months
Characteristics are things about something For example Mammals Characteristics : - Fur or Hair - Born alive - Hot blooded - Omnivore
It's Alive.
NO, it doesn't have any of the characteristics of living things.
Wouldn't know unless there was more detail. There are many circumstances that can cause a miscarriage or a birth ending in stillbirth prematurely.