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11 Causes of a Metallic Taste in the Mouth

4. Pregnancy

Many women experience a metallic taste in their mouths during their pregnancy, especially in the first trimester. Although no-one has identified the exact cause, it is widely believed to be due to the fact that many pregnant women experience a heightened sense of smell. The senses of smell and taste are closely interlinked, making it conceivable that anything affecting the smell can also affect the taste. Many hormones, such as estrogen, are involved in pregnancy and there is speculation that they play a role in altering the sense of taste and smell in pregnant women.

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