Progress in Obstetrics and Gynaecology is now established as the definitive international review series in its field. Each volume includes regular and up-to-date articles on current developments, written by a carefully chosen international team of clinicians involved in research at the frontiers of the specialty. Intended for obstetricians in training and practice, the series is consulted and referred to widely, in all parts of the world, and should feature prominently in the library and on the reference shelf of every practising clinician and clinical department of obstetrics and gynaecology.