Flygirl (sometimes spelled Fly Girl or Fly-Girl) is a super-heroine published by Archie Comics.
Premenstrual dysphoric disorder (PMDD) can be considered a severe form of premenstrual syndrome (PMS). Both PMS and PMDD are characterized by unpleasant physical and psychological symptoms that occur in the second half of a woman's menstrual cycle, most commonly in the days preceding the menstrual period. Premenstrual dysphoric disorder (PMDD) can be considered to be a severe form of premenstrual syndrome (PMS), with symptoms that interfere with daily activities and functioning.
Because they do, they really do. Apparently, Premenstrual Dysphoric Disorder (PMDD), related to the more commonly known PMS, is listed as a psychiatric disorder in the Holy Grail of mental health manuals known as the DSM-5. The description has been on the books since 2000 when the DSM-4 was published.