1 Girls start having periods at different times depending on how quickly they are developing.  If a girl has not had her first period by the time she is 16, this is still probably normal, but it would be worth checking with a doctor.
IETMS stands for Interactive Electronic Technical Manual System. Israeli English Teachers' Network. Institution of Engineering and Technology Northern Ireland. Institute of Engineering Technology of Ontario (Canada) Interagency Environmental Technology Office (Washington, DC) Industrial Effluent Treatment Plant.
United States Army Basic Training (also known as Initial Entry Training or IET) is the program of physical and mental training required for every new soldier in the United States Army, United States Army Reserve, or Army National Guard. It is carried out at several different Army posts around the United States.