OBJECTIVES To investigate the hypothesis that the prostate contracts at ejaculation to push its secretions into the urethra. Although it has been mentioned that the prostate contracts at ejaculation, a report of this finding could not be traced in published studies. METHODS The electromyographic activity of 8 canine prostates was recorded by applying an electrode to the prostate. The prostati...

Steroid hormones regulate sexual behavior primarily by slow, genomically mediated effects. These effects are realized, in part, by enhancing the processing of relevant sensory stimuli, altering the synthesis, release, and/or receptors for neurotransmitters in integrative areas, and increasing the responsiveness of appropriate motor outputs. Dopamine has facilitative effects on sexual motivation...

This chapter will discuss the various sperm preparation and selection techniques used to process sperm for use with assisted reproductive techniques: swim-down, swim-up, migrationsedimentation, density gradient centrifugation, magnetic activated cell sorting, and glass wool filtration. It will also explain the procedures used to prepare viscous semen samples as well as when to obtain and prepar...

Over the past two decades our understanding of ejaculatory dysfunction has evolved from the initial premise that these conditions were almost exclusively due psychological factors to a new understanding. We now understand that men with lifelong premature ejaculation may have an underlying genetic predisposition to rapid ejaculation and that men with acquired premature ejaculation may have, in a...

Premature ejaculation (PE), delayed ejaculation (DE), anejaculation (AE) and retrograde ejaculation (RE) are four main ejaculatory disorders (EjDs) observed in clinical practice. Despite their high prevalence, EjDs remain underdiagnosed and undertreated. Primary care physicians should incorporate the discussion of sexual health topics into routine visits to facilitate EjD diagnosis and treatmen...

A 24-year-old man underwent right radical orchiectomy for testicular teratocarcinoma in May 1982, which was followed by retroperitoneal lymph node dissection. The patient showed no evidence of recurrent disease at followup examinations. The patient later reported a complete loss of ejaculation postoperatively. Erection and orgasm remained normal. Prior use of a sympathomimetic agent, imipramine...

The authors studied the physiological and behavioral responses during sexual behavior in female rats. For this purpose, electrocardiographs were recoded from conscious and unrestrained females using a radiotelemetry system. Heart rate during sexual behavior rose sharply following the introduction of a sexually active male, displayed a peak level of 425 bpm during male ejaculation, and then rapi...

BACKGROUND Kallmann syndrome (Kal S) is an isolated form of hypogonadotrophic hypogonadism in combination with a defect in smell sensation. Depending on the genetic form of the disease, a number of non-reproductive, non-olfactory abnormalities may also be existent. In the present report, we describe a male with Kal S associated with hearing loss, and the successful treatment of his sexual and r...