Bright red period blood is common at the start of your period and indicates blood has passed through your vagina quickly.

Blood can change color during menstruation, ranging from bright red to pink to brown. If you drop trou on your period and see anything but red, try not to panic. Period blood isn’t always red, and ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Most people picture blood as red: bright and oxygen-rich ...