One of the chief benefits enjoyed by Academics is the chance to have exchange and interchange with both specialists and trainees. During our respective careers, we have derived, and continue to derive, great rewards from this invaluable communication, and this was indeed the driving force behind the undertaking of this editorship. The field of Obstetrics differs substantially from that of plain Gynecology as from other specialties as well, since the wishes and expectations of the pregnant woman are very specific and unusually exacting. This multi-author book includes a wide selection of clinical and experimental issues of the most challenging nature.