Black period blood: Pregnancy and other causes - Insider

Black blood or discharge can suggest implantation bleeding, but it can have other explanations, too. Here's when it might be a cause for concern.

A small amount of black blood could happen for a number of reasons, including implantation or a missed miscarriage. But as long as the spotting remains minor, you usually don't need to be concerned. … [+8682 chars]

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