A few women with Turner syndrome have normal ovulatory menstrual cycles during a short time in their life and so are potentially fertile.
These two hormones will eventually regulate menstrual cycles.
A girl may start her first period between the ages of 9 and 16, but it may take several years before she has regular, monthly menstrual cycles.
The diagnosis of PMDD has caused controversy connected to the concern that it may be used against women, labeling them as being impaired by their menstrual cycles.
In the United States, 97.5 percent of women have begun normal menstrual cycles by age 16.