Any child who is pregnant. Adult women and girls between 12 and 17 years of age who have started their menstrual periods will be required to take a pregnancy test at the initial interview. If this is positive, they will not be allowed to take part in the study. At the initial phone screening we will inform both the parent/ guardian and the child that we will require this pregnancy test at the initial interview to determine eligibility and that we will inform both the child and her parents with the results of the test.