Current perspectives of in vitro fertilization and embryo transfer.

The technique of in vitro fertilization (IVF) is now established as a successful clinical procedure for the treatment of infertility in at least two world centres (Cambridge, England; Melbourne, Australia). These two centres are achieving a success rate of establishing pregnancy in more than 20% of patients undergoing attempted oocyte recovery. As a consequence of the independent success of these two groups, there is a rapid proliferation of clinics developing experience with IVF and within a short time there will be many successful and viable IVF clinics operating throughout the world. Already pregnancies are being reported in the USA, France and other clinics in Australia and England. Although much of the initial work towards a viable IVF procedure has been done, application of the procedure for treatment of infertility and the development of many other possible areas for exploration as a result of successful IVF will keep innovative researchers and clinicians busy for a very long time.