How can i help pre-teen daughter prepare for her first period?

Part of sex educatio: In my practice i usually start the dialogue in the office as it is a good way to get your teen's confidence level higher with the parent when there's open communication between parents and the teen for the sex ed. To continue at home. Schools do this as well, but you should tell them what to expect from your own experience, as what the doctor&school teach are global things.