Written specifically for children, this site explains what menstruation is, when it happens, and what a young girl can expect.  It has diagrams and resources and explains unfamiliar terms.  A great place to go to explain menstruation to your young daughter.

Frequently Asked Questions About Periods for Teens

This site links to articles about every topic regarding menstruation you can think of.  From 'Understanding Menstruation' to 'The Tampon Debate' to 'How Puberty and Menstruation Affect Your Mental Health', this site is perfect for anything you'd want to know about your period.

Set up in a question and answer format, this site sets up the basic FAQ's of menstruation and answers them in an easy to follow format.  With a glossary for terms the user may be unfamiliar with, this site is perfect for answering all your questions about menstruation.

Written in an encyclopedia manner, this site offers all the information in a comprehensive and sometimes hard to follow manner.  It goes further in depth about the different cycles and hormonal changes during menstruation.  A good place if you're looking for more medical information.

While this is a site for tampons, the information they offer is great.  This Q&A section gives a funny look at your period, and it links to sections about your first period, you cycle, how to schedule your periods on a calendar, the changes you’re going through, etc.  A fabulous site for women of all ages!

Explains what premenstrual stress syndrome is, the frequency of it, diagnosis and treatment, and offers other viewpoints about PMS.  A great place to go for all around information regarding PMS.