Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.
The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.
Updates regarding government operating status and resumption of normal operations can be found at OPM.gov.
NICHD offers links to information to help better understand menstruation and to find needed support for menstrual problems.
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.
Links to websites of groups that study and provide information about menstruation and menstrual irregularities.
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