**Acknowledgements**

Many thanks to **Professor Efthimios Deligeoroglou**, Head of the Division of Pediatric— Adolescent Gynecology and Reconstructive Surgery, Cherman of 2nd Department of Obstetrics and Gynecology—Medical school, University of Athens, Aretaieion Hospital, Greece for his scientific support due to his great experience and knowenlege in this area. Many thanks to **midwives (Mrs Maria Strofali and Mrs Stavroula Falaga)** of family planning center, Democritus University of Thrace, Greece for their clinical support and examination of teenagers.
