A brief sudden change in a normally constant quantity: a pulse of current; a pulse of radiation. b. Any of a series of intermittent occurrences characterized by a brief sudden change in a quantity.
Some pregnant women experience a metallic taste in their mouth during the early stages of pregnancy, because of the hormone changes. It's also fairly common to crave certain foods, or go off certain foods, and have a heightened sense of smell. Learn more about the signs and symptoms of pregnancy.
You might also experience other sensory changes during this time, including smell and taste. Hormonal changes are thought to cause a condition called dysgeusia in some pregnant women. Dysgeusia refers to changes in taste. Specifically, it can cause your mouth to taste: metallic. salty. burnt. rancid.