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Definitions

fetus

[fee-tuhs] / ˈfi təs /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Scientists have shown that this ratio reflects the balance of estrogen and testosterone a fetus is exposed to during the first trimester of pregnancy.

From Science Daily • Feb. 10, 2026

FDA chief Marty Makary explained that acetaminophen is the only approved over-the-counter drug to treat high fevers in pregnancy that can damage a fetus, and that “the choice still belongs with parents.”

From The Wall Street Journal • Oct. 29, 2025

Fevers can harm the fetus and have been associated with autism and ADHD.

From The Wall Street Journal • Oct. 29, 2025

At her 10-week appointment, she learned that her child had triploidy, a genetic condition where a fetus has three sets of chromosomes instead of two, and would miscarry late-term or die at birth.

From Salon • Oct. 3, 2025

In some mutants, whole segments of the embryo disappeared, or the thorax or abdominal compartments were drastically shortened—analogous to a human fetus born with no middle or with no hind segment.

From "The Gene" by Siddhartha Mukherjee