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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

Anti-inflammatory medicines like aspirin can endanger the fetus.

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

Quadros’s research has found that a specific autoantibody blocks the transport of folate from mother to fetus during pregnancy and when present after birth, the infant’s brain.

From The Wall Street Journal • Sep. 24, 2025

Once inside the womb, semen matured into a fetus via nourishment from the mother.

From "The Gene" by Siddhartha Mukherjee