Reviews in Gynaecological and Perinatal Practice is a series of reviews which aims to provide the reader with an up-to-date, practical evidence based series of articles on current, topical areas in the specialities' spectrum of interest. The published articles seek to address the practical, clinical issues on key areas, following a problem oriented approach to include diagnosis, treatment and patient management. The invited authors are professionals at the forefront of the current advances in these areas.