The thought itself is scary isn t it? Imagine if you suddenly notice blood oozing out of your nipples for no rhyme and reason. Sure it is going to freak you out no matter whether you are pregnant or not. But during pregnancy a lot of changes happen to your breast they grow in size start to produce milk prepare for the lactation phase get sore and tender etc. But still bleeding through your nipple is not something you will expect during pregnancy. At worst nipple discharge or even bloody discharge from breast could be indicative of an untoward incident