[cgk]

In the Latin Dictionary I have (pre Roe v Wade and political correctness), "fetus" is defined as "offspring", "child", and/or "little one."

[daylate-dollarshort]

Perhaps you should try a medical dictionary.

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Main Entry: fe·tus
Variant(s): or chiefly British foe·tus
Function: noun Inflected Form(s): plural fe·tus·es or chiefly British foe·tus·es or foe·ti

: an unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind ; specifically : a developing human from usually three months after conception to birth

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From the Merriam Webster Medical Dictionary by way of The National Institutes of Health.