More than 42 percent of never-married adolescents ages 15 to 19 say they have had sex at least once.

Researchers from the National Center for Health Statistics report that from 2011 to 2015, 42.4 percent of never-married girls (four million) and 44.2 percent of never-married boys (4.4 million) had had sexual intercourse.

Among the majority who had not had sex, the reasons varied. More than 35 percent of girls and almost 28 percent of boys said that it was against their religion or moral code.

A fifth of both boys and girls cited fear of pregnancy as the reason for abstaining. Almost 23 percent said they had not yet found the right person.

Researchers gathered the data from September 2011 to September 2015 in interviews with 20,621 men and women, including 4,134 teenagers. The sample is nationally representative.