Hormones, and in particular estrogen, seem to play a role in controlling and moderating our sense of taste. And when you're pregnant, estrogen levels â€” and hence your sense of taste â€” may fluctuate widely. Plus, your sense of taste and your sense of smell are intimately connected, so pregnancy-related changes in your sense of smell may also lead to dysgeusia (metallic taste). It is very common in pregnancy and will probably disappear closer to the end of your second trimester. Your prenatal vitamins may also be the cause of this problem. Talk to your obstetrician about changing them.
In the meantime, try eating sour foods (lemonade, citrus juice, pickles, etc.) and rinsing your mouth with a baking soda and water solution (1/4 tsp. baking soda, 1 cup water) to neutralize the pH levels in your mouth.
at 5:33 PM on Feb. 2, 2010