What is a teratogen?

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The question asks: What is a teratogen?

Option 1: 'a substance that can cause stillbirth' — This is not the standard definition of a teratogen. Stillbirth is a possible outcome of various conditions, but teratogens are specifically agents that cause developmental anomalies, not exclusively stillbirth.

Option 2: 'a substance that can cause gestational diabetes' — Gestational diabetes results from hormonal and metabolic changes during pregnancy. A teratogen is defined by causing birth defects or malformations, not by inducing gestational diabetes.

Option 3: 'a substance that can cause birth defects' — This aligns with the established definition of a teratogen: an agent that can disturb fetal development and lead to congenital anomalies or birth defects. This is the accurate characterization among the choices.

Option 4: 'a substance that can cause anemia' — While some substances might contribute to anemia, anemia itself is not the defining outcome associated with teratogenicity. Teratogens are about congenital malformations, not primarily blood-related deficiencies.

In summary, option 3 correctly identifies a teratogen as an agent capable of causing birth defects, while options 1, 2, and 4 describe other possible pregnancy-related issues that are not the canonical definition of teratogenicity.

BIO 132-Introduction to Nutrition-931 Exam 4

What is a teratogen?

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