Sexting has increased among teens in recent years, and increases as youths age, according to new research published in JAMA Pediatrics.
An estimated one in seven teens sends sexts and one in four receives them, according to the research.
The paper reviews 39 studies conducted between 1990 to 2016 involving more than 110,000 participants. Two studies took place in Australia, and others in countries including the United States, Korea and South Africa.
The law is struggling to keep up with teenagers having underage sex and using mobiles to send explicit photos to each other. Lawyers and judges in South Australia said they were seeing an increase in sexting and underage sex cases coming before the courts.