You'll know you're in it because: There's blood on the toilet paper when you wipe, or you notice blood-streaked mucus on your panties. "When the cervix starts to open, tiny little blood vessels break," Nicholson explains. "So-called 'bloody show' is a definite sign that the cervix is starting to dilate." While you might notice a little blood-tinged mucus when you lose your mucus plug, bloody show during labor is more constant, and the amount of discharge increases as your labor progresses.
How long it lasts: Throughout the first stage
How to deal: Call your care provider and describe your discharge.When did it start? What does it look like? You may or may not have contractions at this point. It's OK to wear a pantyliner, but you shouldn't need a pad to absorb the flow.