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 is an acronym for the International English Language Testing System, a standardized English language test that assesses an individualâs reading, writing, and verbal skills. The IELTS is an English language exam that allows non-native speakers to demonstrate their proficiency in the language.