Advances in Reproductive Health Care – serie

To focus on this and related problems an International Congress to examine many aspects of male and female Reproductive Health Center Care was held on 10-15 October 1982 in Maui, Hawaii, USA. Speakers were invited to review the state of the art in several areas related to male contra­ ception, reproductive toxicity and reproductive biology.

Hasson, MD Chicago, Illinois, USA ix 1 Ultrastructure of the decidual response to a progesterone­ releasing IUD U.M. From these studies it has become clear that the alterations in morphology as well as in the physiological milieu produced by the IUD are manifold and differ greatly with the type of IUD used.

A. CORBIN Investigations on LHRH and its analogs have just completed their first decade. We have witnessed a veritable explosion of chemical, physiologic and pharmacologic data on this hypothalamic peptide and the approximately 1500 agonist and antagonist analogs that have been synthesized. In order to track this expanding field, I was asked to organize an international symposium on basic and clinical aspects of LHRH analogs as part of the Reproductive Health Care: CDS Symposium held in Maui, Hawaii, in October 1982. This meeting brought together a number of the leading investigators in the field. Much new state-of-the-art information was presented which I and my colleagues felt deserved a wider audience. Drs Vickery, Nestor, and Hafez consented to undertake this task. Upon review of the literature, it was apparent that there was no recent text which fully covered the breadth of developments in the field. Accordingly, the editors decided to use the symposium as a nucleus on which to build a singular, comprehensive state-of-the-art analysis of this rapidly growing discipline, and the application of such knowledge to reproductive medicine. As exemplified by the various areas of expertise provided by the individual contributors, it becomes obvious that the scope of the subject matter, while relating solely to a well-defined chemical class (LHRH analogs) and a circumscribed physiologic and pharmacologic entity (reproduction), has expanded enormously.

The role of prostaglandins in physiological events and pathological disorders related to human reproduction has been most actively investigated in the past decade. Their clinical use for fertility regulation, extensively evaluated, represents the most common clinical indication for the administration of these remarkable compounds. Thus, it is most appropriate to update the available information related to the use of prostaglandins in the regulation of human fertility to provide a background document for the benefit of clinicians and scientists. Invited experts of international reputation from various parts of the world have contributed, each in his own area of interest, to offer this book, which we hope will fill an existing gap. M. T. M. B. E. S. E. H. ix 1 Potential for prostaglandin use in controlling human reproduction K. T. KIRTON and F. A. KIMBALL BACKGROUND It was observed in 1930 that seminal plasma of a number of species contained very large amounts of substance(s) capable of altering uterine motility. These substances were subsequently demonstrated to be prostaglandins (PGs); this began the early and continued association of this group of compounds with reproduction. The activity was found to be associated with a fraction containing lipid-soluble acids, derived from prostanoic acid. Restrictions imposed by obscure sources and small amounts of material available for testing were initially impediments to their study.

This series of volumes dealing with reproductive health care has as its primary objective the improvement of the quality of human reproduction. The of knowledge and new technology give us opportunities as never explosion before to accomplish this end. The Editor has brought together contributors who are outstanding scientists from around the world. A number of the authors have personally made significant contributions to our body of knowledge in reproductive medicine. Bringing all this information together in an easily readable format is a great service. This is essential reading for all concerned with the control and improvement of human reproduction and the correction of its many deficits. xv P'art I Physio-anatom-ical Parameters 1 Uterine microvasculature and spontaneous abortion M. TAKADA In the implantation and subsequent development of a fertilized ovum, its integrity is most significant. However, with maternal local factors, i.e., unsatisfactory uterine conditions, implantation may not succeed even if the integrity of the fertilized ovum is excellent; if implantation is made, the maturation of the fetoplacental unit following implantation is disturbed, which leads to abnormalities in fetal development or to miscarriage. Thus, the uteroplacental unit, as well as the fetoplacental unit, plays an important role in the establishment and maintenance of pregnancy. Among the mechanisms of the utero placental unit, most significant is the physiological mechanism of the uterine microvasculature and its correspon­ dence to gestation. In particular, homeostasis of simultaneous cooperative development of the uterine wall and the placenta is most important.