have intercourse

If women are waiting for ovulation to have intercourse, they may already have missed most of their fertile period for that menstrual cycle."

"We take things very slowly at their own pace and if they want to have intercourse at some stage then that is what we do," he added.

Similarly, in the model controlling for the behavior of teenagers' friends, youth who had moved shortly before Wave 1 did not have an elevated likelihood of beginning to have intercourse; sexual initiation was positively associated with peers' delinquency and inversely associated with their grade point average.

In particular, these associations can help educators and service providers to identify young women who are more likely to have intercourse at an early age and to provide sexual health programs and services appropriate to their needs.