The rule is simpler than the worry: a normal period does not disqualify you from donating blood. Women donate on their periods all over the world, every day, without incident. If you feel well, the chair is yours.
What actually decides it
- How you feel today. Cramps that have you curled up, dizziness, heavy-flow exhaustion — skip this week. A normal, manageable flow — donate freely.
- The haemoglobin test. 12.5 g/dL, same gate as everyone. Women with heavy periods sometimes run lower — the test is honest, and a low result just means iron-rich food and a return in a few weeks.
- Honesty over heroics. Nobody benefits from a donor who white-knuckles a donation through a bad day. Rescheduling is a normal, respected act — the register keeps your slot.
The questions we get
- “Will it delay my period?” No. 450 mL does not touch your cycle’s timing or flow.
- “Will it make the flow heavier next time?” No — donation has no effect on menstrual patterns.
- “Is it ‘impure’ to donate during periods?” No. That idea has no basis in medicine, and none in most religious teachings either. Blood is blood; yours saves lives on any day of the month.
The long game
Women who donate regularly report less period anxiety about anaemia — because they are watching their haemoglobin every quarter. The register needs far more women. If your period has been quietly talking you out of donating, this page exists to stop it.