Hello again I an enclosing the information that I found on the internet for explaining your daughters period to her in language that is not threatening. The sites that look really good for childrens information is kidshealth.org, and womenshealthabout.com. Kidshealth.org is a very good site and you go to the site and click on teen health and type in menstruation (period), and the information can be downloaded to see or print out for your convenience. Medlineplus also has information on menstruation as well, if you would like to check their site out (although this is a website for most biological conditions as well including mental health issues). I hope the best for you and your daughter in explaining having a period to her, and I hope you get the help you need in explaining it to her in the right manner. Take care Welcome to Psych Central again. Soidhonia