How to use Lumen.

Lumen helps you plan your work week around your hormonal cycle. It is informational, not medical advice. We do our best to base recommendations on peer-reviewed research, but Lumen cannot replace a conversation with a healthcare provider.

Nothing on Lumen is intended to diagnose, treat, cure, or prevent any condition. If you experience symptoms that worry you (irregular cycles, severe pain, mood changes that affect your daily life, or anything else), please consult a qualified medical professional.

Decisions about your health should be made with a clinician who knows your full history, not a calculator.

Lumen is provided as-is. We make no guarantee that the recommendations will work for your specific situation. Hormonal experience varies widely; cycle science is still evolving. Take what is useful, leave what is not.

To the maximum extent permitted by law, Lumen and its creators are not liable for any direct or indirect outcomes arising from use of this tool, including productivity decisions, scheduling choices, or health consequences.

Lumen is for personal use. You may share it with friends, link to it from articles, and reference it in your own writing. You may not repackage, resell, or scrape the tool, content, or data structure without permission.

We may update Lumen, including these terms, as the tool evolves. The current version of this page is always the binding one. If we make significant changes, we will note them at the top of the page.