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https://www.readbyqxmd.com/read/29161211/sexual-cognitions-trait-anxiety-sexual-anxiety-and-distress-in-men-with-different-subtypes-of-premature-ejaculation-and-in-their-partners
#1
Philippe Kempeneers, Robert Andrianne, Marion Cuddy, Sylvie Blairy
This study examined trait anxiety and sexual cognitions in 610 men with premature ejaculation (PE) (DSM-IV-TR criteria) and in 107 partners of these men, and compared their scores to normative data. Sexual anxiety, intra-vaginal ejaculatory latency time, feeling of control over ejaculation, and PE-related distress were also assessed. The scores of 343 participants (56.23%) with clearly identifiable subtypes of PE according to Waldinger's classification system (lifelong, acquired, variable and subjective subtypes) were compared in these domains...
November 21, 2017: Journal of Sex & Marital Therapy
https://www.readbyqxmd.com/read/29160554/digest-evolution-of-sperm-size-and-number-in-external-fertilizers
#2
Pedram Samani
Ejaculate evolution in externally fertilizing species is influenced by competition among sperm as well as the rate at which sperm and eggs encounter one another. Liao et al. (2017) found that ejaculate evolution in external fertilizers depended on spawning conditions. In anurans, gametes are released very close to eggs and are relatively protected from dispersal by water currents, thus sperm competition is more important. However, in fish, sperm-egg encounter rate plays a much more important role in ejaculate evolution because gametes may be easily dispersed when released into the aquatic environment...
November 21, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29159805/the-anatomy-of-the-infrarenal-lumbar-splanchnic-nerves-in-human-cadavers-implications-for-retroperitoneal-nerve-sparing-surgery
#3
Tyler S Beveridge, Dale E Fournier, Adam M R Groh, Marjorie Johnson, Nicholas E Power, Brian L Allman
Injury to the nerves of the aortic- and superior hypogastric plexuses during retroperitoneal surgery often results in significant post-operative complications, including retrograde ejaculation and/or loss of seminal emission in males. Although previous characterizations of these plexuses have done well to provide a basis for understanding the typical anatomy, additional research into the common variations of these plexuses could further optimize nerve-sparing techniques for retroperitoneal surgery. To achieve this, the present study aimed to document the prevalence and positional variability of the infrarenal lumbar splanchnic nerves (LSNs) through gross dissection of 26 human cadavers...
November 21, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29158481/female-specific-myoinhibitory-peptide-neurons-regulate-mating-receptivity-in-drosophila-melanogaster
#4
Yong-Hoon Jang, Hyo-Seok Chae, Young-Joon Kim
Upon mating, fruit fly females become refractory to further mating for several days. An ejaculate protein called sex peptide (SP) acts on uterine neurons to trigger this behavioural change, but it is still unclear how the SP signal modifies the mating decision. Here we describe two groups of female-specific local interneurons that are important for this process-the ventral abdominal lateral (vAL) and ventral abdominal medial (vAM) interneurons. Both vAL and vAM express myoinhibitory peptide (Mip)-GAL4. vAL is positive for Mip neuropeptides and the sex-determining transcriptional factor doublesex...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29158352/intracytoplasmic-sperm-injection-state-of-the-art-in-humans
#5
Gianpiero D Palermo, Claire L O'Neill, Stephen Chow, Stephanie Cheung, Alessandra Parrella, Nigel Pereira, Zev Rosenwaks
Amongst infertile couples, 25% involve both male and female factors, while male factor alone accounts for another 25% due to oligo-, astheno-, terato-zoospermia, a combination of the three, or even a complete absence of sperm cells in the ejaculate and can lead to a poor prognosis even with the help of assisted reproductive technology (ART). Intracytoplasmic sperm injection (ICSI) has been with us now for a quarter of a century and in spite of the controversy generated since its inception, it remains in the forefront of the techniques utilized in ART...
November 20, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29157008/a-comparative-evaluation-of-migration-sedimentation-method-for-sperm-preparation
#6
Sevil Kiratli, Mehmet Yuncu, Kenan Kose, Sinan Ozkavukcu
The effectiveness of semen preparation using the migration-sedimentation (MS) method was evaluated, and compared to density gradient centrifuge and swim-up combination (DGC+SU). Sperm selection using MS is based on motility, thus, deleterious effects for which centrifugation has been blamed, are believed to be avoided. Normozoospermic male patients who had more than 10% forward progressive motile sperm in their ejaculate were included in the study. Spermatozoa selected by two different methods were investigated and compared according to sperm motility, concentration, morphology, vitality, DNA fragmentation, and presence of persistent histones...
November 20, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29154176/seasonal-changes-in-the-sperm-fatty-acid-composition-of-shetland-pony-stallions
#7
Christine Aurich, Cristina Ortega Ferrusola, Fernando Juan Peña Vega, Nadine Schrammel, David Morcuende, Jörg Aurich
Spermatozoa contain polyunsaturated fatty acids (PUFA). Cryopreservation damages sperm membranes and they become less functional after thawing. We analysed the lipid composition of spermatozoa from Shetland stallions (n = 15) collected monthly from January to June and hypothesized that sperm lipid patterns change with season. In addition, one ejaculate per month was submitted to cryopreservation. Content of saturated palmytic and stearic acid decreased from January to March (p < 0.001) while content of the PUFA docosapentaenoic (p < 0...
November 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/29150942/a-novel-epididymal-quiescence-factor-inhibits-sperm-motility-by-modulating-nos-activity-and-intracellular-no-cgmp-pathway
#8
Prasanta Ghosh, Sandipan Mukherjee, Arpita Bhoumik, Sandhya Rekha Dungdung
Mature and potentially motile spermatozoa stored in cauda epididymis in an inactive state for approximately 30 days; however during ejaculation they regain motility. To understand the actual molecular mechanism of the sperm quiescence during caudal stay, a proteinaceous quiescence factor (QF) has been purified from caprine epididymal plasma to apparent homogeneity. In the present study complete purification, detailed characterization as well as mechanistic pathway of QF has been described. QF was purified to 215 fold with 45% activity recovery...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29150283/transcutaneous-neuromuscular-electrical-stimulation-may-be-beneficial-in-the-treatment-of-premature-ejaculation
#9
Ilan Gruenwald, Ege Can Serefoglu, Tal Gollan, Shmuel Springer, Gideon Meiry, Boaz Appel, Arik Shechter
Approximately 20-30% of sexually active men suffer from Premature Ejaculation (PE), but the pathophysiology still remains unclear and the current available treatments for PE are unsatisfying. Considering the role of rhythmic bulbospongiosus and ischiocavernosus Muscles contractions on the ejaculatory reflex, we hypothesize that weakening this muscles via inhibiting it's contractions by Application of Neuromuscular Electrical Stimulation prior to the planned sexual activity, may have a beneficial effect in the treatment of PE...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149676/high-salt-diet-decreases-reproductive-performance-in-rams-and-down-regulates-gene-expression-of-some-components-of-the-renin-angiotensin-system-in-the-testis
#10
Yi Fang, Rongzhen Zhong, Xuezhao Sun, Daowei Zhou
Although salt-tolerant plants can be used to combat dryland salinity, these plants contain high concentrations of salt (NaCl), which may have deleterious effects if fed to livestock. Twenty-four Merino rams (9 mo of age) with similar body weight were equally allocated to two groups and fed a normal- or high-salt diet (0.5 and 12% NaCl, respectively) for 3 mo. Rams fed the high-salt diet had lower live weight gains, higher water intake, smaller testes (466 ± 48.4 vs 604 ± 51.1 g) and reductions (P <0...
November 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/29148792/proteomic-markers-of-the-functional-sperm-population-in-bovines-1-comparison-of-low-and-high-density-spermatozoa-following-cryopreservation
#11
Olivier D'Amours, Gilles Frenette, Sylvie Bourassa, Ezequiel Calvo, Patrick Blondin, Robert Sullivan
Mammalian semen contains a heterogeneous population of sperm cells. This heterogeneity results from variability in the complex processes of cell differentiation in the testis, biochemical modifications undergone by spermatozoa during transit along the male reproductive tract, interactions with secretions from accessory sex glands at ejaculation, and, in the context of reproductive technologies, in the ability of ejaculated spermatozoa to resist damage associated with freeze-thaw procedures. When submitted to density gradient centrifugation, ejaculated spermatozoa distribute themselves into two distinct populations: a low-density population characterized by low motility parameters, and a high-density population with high motility characteristics...
November 17, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29144913/re-silodosin-versus-naftopidil-in-the-treatment-of-premature-ejaculation-a%C3%A2-prospective-multicenter-trial
#12
Allen D Seftel
No abstract text is available yet for this article.
December 2017: Journal of Urology
https://www.readbyqxmd.com/read/29143963/expression-of-paraoxonase-types-1-2-and-3-in-reproductive-tissues-and-activity-of-paraoxonase-type-1-in-the-serum-and-seminal-plasma-of-bulls
#13
C E R Ferreira, C S Haas, K L Goularte, M T Rovani, F F Cardoso, A Schneider, B G Gasperin, T Lucia
The paraoxonases types 1, 2 and 3 (PON1, PON2 and PON3, respectively) are enzymes that degrade lipid peroxides, preventing oxidative damages relevant for male reproductive function. This study determined the expression of those three paraoxonases in reproductive tissues of bulls and evaluated correlations among the activity of PON1 in the serum and seminal plasma with breeding soundness parameters in bulls. The expression of PON1, PON2 and PON3 was characterised by RT-PCR in samples of testicular parenchyma, vesicular glands and epididymis collected from three slaughtered bulls...
November 16, 2017: Andrologia
https://www.readbyqxmd.com/read/29135156/-isolated-teratozoospermia-is-there-a-role-for-antioxidant-therapy
#14
E A Efremov, E V Kasatonova, Ya I Melnik, A A Nikushina
Recently, literature has emerged that offers contradictory findings of idiopathic forms of isolated teratozoospermia that may confuse clinicians. Some researchers argue that at 0-1% of normal forms of spermatozoa, morphology itself cannot be a prognostic indicator of fertility, either in the planning of natural pregnancy, or when used in assisted reproduction. In this connection, the possible causes of teratozoospermia and alternative therapies are being actively sought, in addition to known invasive and costly procedures...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29135153/-the-evidence-for-the-efficiency-and-safety-of-dapoxetine-in-treating-premature-ejaculation
#15
N D Akhvlediani, I P Matyukhov
The aim of the study is to assess the evidence on the efficacy and safety of dapoxetine in premature ejaculation (PE). The analysis includes results of randomized placebo-controlled trials, integrative reviews and one meta-analysis on the clinical efficacy and safety of dapoxetine. All studies have shown higher efficacy of dapoxetine in patients with PE compared with placebo. Its administration at a dosage of 30 and 60 mg results in an increase in the coitus duration up to approximately 3 and 3.5 minutes, respectively...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29131658/measuring-male-to-male-differences-in-fertility-or-effects-of-semen-treatments
#16
Rupert P Amann, Richard G Saacke, Guy F Barbato, Dagmar Waberski
Fertility is a convenient but meaningless term unless the outcome measure is stipulated and accounts for dependence of male fertility on the female population. We describe outcome measures and detail the impacts of the physiological status of each female and her external environment, as well as management imposed by humans. We explain the dominant role of the female reproductive tract as a series of hurdles for sperm seeking an ovum. Each spermatozoon in an ejaculate is unique, although usually most are morphologically similar...
November 13, 2017: Annual Review of Animal Biosciences
https://www.readbyqxmd.com/read/29128699/feasibility-of-semen-collection-in-red-winged-tinamou-rhynchotus-rufescens-by-manual-stimulation-and-sazonality-implications
#17
Cristiane Sella Paranzini, Luiz Eduardo Cruz Dos Santos Correia, Laiza Sartori de Camargo, Kelry Mayara Silva, Tatyana Mendes de França, Josineudson Augusto de Vasconcelos Silva, Nabor Veiga, Fabiana Ferreira de Souza
This study aimed to report in detail, the technique and challenges of cloacal massage, to collect and evaluate semen from red-winged tinamou (Rhynchotus rufescens) keep in captivity, performed by only one technician. Sixty-four semen collection attempts, from 16 adult males, during breeding season and 16 attempts form these same 16 males in non-breeding season, were performed. Prior to collection, all animals were conditioned to cloacal massage for 6 weeks and the ejaculates were succeed with viable spermatozoa and then, evaluated for feces, urine and mucus contamination, volume, concentration, sperm vigor, motility, morphological defects and acrosome integrity...
October 28, 2017: Theriogenology
https://www.readbyqxmd.com/read/29128698/seminal-plasma-antioxidants-are-directly-involved-in-boar-sperm-cryotolerance
#18
Junwei Li, Isabel Barranco, Asta Tvarijonaviciute, Manuel F Molina, Emilio A Martinez, Heriberto Rodriguez-Martinez, Inmaculada Parrilla, Jordi Roca
Boar ejaculates are ejected in fractions with a specific composition in terms of sperm numbers and seminal plasma (SP), which is reflected in the varying sperm cryotolerance observed among different fractions. As boar sperm are particularly sensitive to oxidative stress, this study evaluated the role of SP antioxidants in the observed differences in sperm cryotolerance among ejaculate fractions. Ten ejaculates from five boars were manually collected in fractions: the first 10 mL of the sperm-rich fraction (SRF), the rest of the SRF and the post-SRF...
October 31, 2017: Theriogenology
https://www.readbyqxmd.com/read/29128269/post-orgasmic-illness-syndrome-a-review
#19
REVIEW
Hoang Minh Tue Nguyen, Areeg Bala, Andrew T Gabrielson, Wayne J G Hellstrom
INTRODUCTION: Post-orgasmic illness syndrome (POIS) is a rare but debilitating cluster of postejaculatory symptoms affecting men. It is a chronic disorder manifesting as a constellation of flulike and allergic symptoms within seconds, minutes, or hours after ejaculation. POIS can be followed by mental sequelae such as diminished concentration and irritability. POIS negatively affects the life of patients by limiting sexual encounters, dampening romantic prospects, creating internal struggles to avoid eroticism, and affecting patients' schedules...
November 8, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/29124247/chlamydia-trachomatis-versus-common-uropathogens-as-a-cause-of-chronic-bacterial-prostatitis-is-there-any-difference-results-of-a-prospective-parallel-cohort-study
#20
Tommaso Cai, Francesca Pisano, Gabriella Nesi, Vittorio Magri, Paolo Verze, Gianpaolo Perletti, Paolo Gontero, Vincenzo Mirone, Riccardo Bartoletti
Purpose: The role of Chlamydia trachomatis (CT) infection in chronic bacterial prostatitis (CBP) is well known. What is unclear is whether there are any differences in the course or clinical outcome of the disease when the cause is CT or other uropathogens. Materials and Methods: A series of 311 patients affected by CBP due to CT (cohort A) was compared with a group of 524 patients affected by CBP caused by common uropathogen bacteria (cohort B). All participants completed the following questionnaires: National Institutes of Health Chronic Prostatitis Symptom Index, International Prostate Symptom Score, International Index of Erectile Function-15 erectile function domain (IIEF-15-EFD), Premature Ejaculation Diagnostic Tool (PEDT), and the Short Form 36 (SF-36) Health Survey...
November 2017: Investigative and Clinical Urology
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