Learn what different shades of blood mean and how they signal changes in your health or potential medical issues.

The color of a person’s period blood can indicate different health conditions. For example, a bright red period indicates a healthy flow, while darker red or dark brown can signify pregnancy.

Period blood color can change from bright red to dark red ... However, in some cases: Dark red or brown blood may be an early sign of pregnancy. Black blood suggests an older blood flow.