Fetus

usgb/ˈfiːtəs/
noun

An unborn baby that is more than eight weeks old, inside its mother's womb.

The doctor performed an ultrasound to check the health of the fetus.
Visual representation of "fetus" - An unborn baby that is more than eight weeks old, inside its mother's womb

Often appears as...

  • fetal development
  • fetal heartbeat

Usage tips

Technical

Definition 1 of 2
Visual representation of "fetus"
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Stage Specific

Use 'fetus' for development stages over eight weeks, before that it's called 'embryo'.

Illustration for Stage Specific
The fetus is now the size of an orange.
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Medical Context

'Fetus' is often used by healthcare professionals to communicate about pregnancy.

Illustration for Medical Context
The fetus's heartbeat is strong and healthy.
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Technical Term

'Fetus' is a technical term; 'baby' might be used informally after birth.

Illustration for Technical Term
We saw our baby's fetus during the sonogram.
Visual representation of the word "Fetus"

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