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.
IELTS stands for âInternational English Language Testing System.â This test assesses the English ability of non-native English speakers. The IELTS is used for the purposes of study, employment, and immigration in the English-speaking world. These uses are a very important part of IELTS meaning.