If you mean aerial drones, some number more than 670,000 UAVs have been registered by the FAA. It has been estimated that something like 1 million will be flying by the New Year 2018. I guess that some 50 industries use drones with something like 30,000+ women and men learning to be commercial, etc pilots.
1 Secondary amenorrhoea is where an established menstruation has ceasedâfor three months in a woman with a history of regular cyclic bleeding, or nine months in a woman with a history of irregular periods. 2  This usually happens to women aged 40â55.
Secondary dysmenorrhea is triggered by another condition, such as endometriosis or uterine fibroids. Heavy bleeding (menorrhagia) includes prolonged menstrual periods or excessive bleeding. Absence of menstruation (amenorrhea). Primary amenorrhea is considered when a girl does not begin to menstruate by the age of 16.