The term "spotting" means very light vaginal bleeding during pregnancy or between periods. Spotting is usually light and brown, although heavy spotting can be red. A woman who is spotting might need only a panty liner rather than menstrual supplies to control the flow.
Spotting can be a symptom of impending miscarriage but can also happen in a normal pregnancy. Sexual intercourse in pregnancy may cause spotting, as might a vaginal exam or other irritation to the cervix, but this bleeding would stop. Any woman experiencing spotting should call her doctor if she is concerned.