| About.com: Menstruation: Menstration covers the basics for young women, as well as details of what you should expect and when bleeding is excessive. |
| All about Menstruation - from FWHC: What really happens during those 28 days? All about ovulation, hormones, cycles, PMS, Menopause, fertility awareness, and customs and traditions of various cultures. |
| eMedicine Health - Menstrual Pain: Consumer health resource center providing information on the causes, symptoms, and treatment. |
| Finding Out Why Your Periods are Abnormal: Information on the causes of missing, irregular or otherwise abnormal menstruation. |
| KotexFits: Offers advice a woman needs about periods, menstruation, health and well being, and PMS. Includes maternity and menopause. |
| Menstrual Delay or Skipping: Answers to frequently asked questions about irregularities in the menstrual cycle, particularly late or skipped periods. |
| Menstrual Disorders: Explains the irregular menstruation cycle including abnormal menstrual bleeding and missed periods. Notes common diagnoses and treatments for menstrual disorders. |
| Menstrual Disorders Clinical Trials: Explains the importance of participating in menstrual disorders clinical trials and how even participants who take placebos contribute and benefit from volunteering. |
| Menstruation: Or, who says women can't stand the sight of blood? by Alana Wingfoot. |
| Museum of Menstruation and Women's Health: Articles, images, humor, and other resources about the cultural history of menstruation, methods of managing it, and related aspects of female health. |
| My Period Trends: Calculate and print out your mentruation cycle period. Set reminder via email. |
| MyMonthlyCycles: Online calendar for tracking menstrual and fertility cycles and symptoms. Includes a period prediction calculator and menstruation charts. |
| Periodic Table: Information and links about menstruation, patterns and commercial sources for reusable cloth sanitary pads and internal cups, and menstrual extraction. |
| Ruth's Page: Tampons - what you don't know could hurt you. |
| Tampaction: A campaign to replace tampons with healthy alternatives and to create positive attitudes towards menstruation and women's bodies. |
| Tamponart: Gallery of art works created with tampons, letters section, articles, and links. |
| The Cycles Page: A web-based application for tracking and predicting monthly menstrual periods. |
| The Red Spot: Menstrual Culture: The Red Spot is an information source for women and girls about their periods. |
| The Sacred Cycle: A powerful and transformational work which addresses what it is to be female. It empowers women by embracing the biological cycle and dispels the negative programming women receive from society. |
| The TLounge: A place where young women can find answers about menstruation. |
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