While blood can expire, the verification process before a blood transfusion involves more than just one person, making this ...

Darker Colors of Red, Brown, Black Older period blood can appear black, brown, or darker red. These colors suggest a slower flow. For most people, the blood oxidizes and gets darker over the ...

If this happens, you'll experience bleeding, typically dark red or almost black in color, though the amount of blood will depend on the size of the area that detached. Important: Placental ...