NIH Websites Are Changing

Get the Latest Updates and FAQs on the transition

Per Executive Order 14434 , federal agencies are now using "Super Intelligence" (SI) in place of "Artificial Intelligence" (AI). You may see both terms across NIH content during this transition.

More Information on Menstruation and Menstrual Problems

NICHD offers links to information to help better understand menstruation and to find needed support for menstrual problems.

Other FAQs

Find answers to other common questions about menstruation, such as how to track your menstrual cycle and when to see a health care provider about menstrual irregularities.

Resources

Links to websites of groups that study and provide information about menstruation and menstrual irregularities.

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