Basic understanding of the male reproductive system is fundamental in effective evaluation and treatment of male infertility. This chapter is a concise introduction to the male reproductive anatomy and the intricately designed process of spermatogenesis along with its hormonal control.

-The Texas Platycynorta transversalis is regarded as a junior synonym of V . sayi. Karyotypes of male and female V. sayi from central Texas reveal 2n = 78. This number is almost twice that previously reported for any other harvestman. The male reproductive system of V. sayi is described and illustrated. Natural history data are provided for egg laying and developmental times. The supercooling p...

Paper presents the first description of the so far unknown sexual generation of Pterocomma tremulae (Aphididae, Aphidinae): oviparous female and alate male. It also provides detailed description of the male reproductive system. Discussion focuses on comparative analysis of male reproductive system with other aphid groups and possible importance of its structure in resolving phylogenetic interre...

Male infertility is directly or indirectly responsible for 60% of cases involving reproductive-age couples with fertility-related issues. Nevertheless, the evaluation of male infertility is often underestimated or postponed. A coordinated evaluation of the infertile male using standardized procedures improves both diagnostic precision and the results of subsequent management in terms of effecti...

General The male reproductive system tissues include testes, epididymides, the various accessory sex glands, and the penis. These tissues exhibit direct and indirect (usually hormonal) pleotrophic pathologic responses, often with a change in one reproductive tissue accompanied by changes in other reproductive tissues. The majority of the male reproductive tissues are paired, allowing identifica...

An enormous diversity of antigenically distinct proteins is found in seminal plasma. These include proteases, protease inhibitors, signal transduction molecules, protein kinases and phosphatases, transporter proteins, structural molecules, and immune response proteins. Sperm, too, carry a plethora of surface proteins; these mediate species-specific binding to the zona pellucida surrounding the ...

A brief review of the history of the subject is provided. An attempt is made to define the current status of the knowledge and the reasons why our knowledge in this area of science is poor. The information gained from studies employing lower species is contrasted with information on the human male. The most commonly utilized techniques for evaluating the effects of toxic agents on the male repr...

In view of the persistent claim of Australian Vietnam veterans that their health and that of their children were adversely affected, aspects of reproductive behaviour and the distribution of disease and disability in family units were investigated in a sample of Tasmanian veterans and another group chosen for comparison of selected characteristics. One third of veterans reported serious health ...