Clinical improvements of specific seminal deficiencies via intercourse with a seminal collection device versus masturbation

Zavos, Panayiotis M.; Goodpasture, Jessie C.

doi:10.1016/s0015-0282(16)60455-7

Cited by 68 publications

(36 citation statements)

References 3 publications

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“…Second, our study tested for the effect of habituation on a set of ejaculate parameters, whereas previous studies tested for effects on arousal. The association between sperm parameters and arousal has not been well-studied, although there is some evidence that they are positively associated (Zavos 1985;Zavos and Goodpasture 1989;van Roijen et al 1996). In the case of habituation studies, tests of effects on arousal response do not allow for the participants to ejaculate during the session.…”

Section: Discussionmentioning

confidence: 99%

Men Ejaculate Larger Volumes of Semen, More Motile Sperm, and More Quickly when Exposed to Images of Novel Women

Joseph

Sharma

Agarwal

et al. 2015

Evolutionary Psychological Science

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Males in many species differentially allocate sperm and seminal fluid depending on certain social variables, including perceived sperm competition and female reproductive status. In some species, males reduce their investment in sperm quantity or quality upon repeated matings with the same female and increase such investment when mated to a novel female. We tested for effects of stimulus habituation and novelty on ejaculated semen parameters in humans. We analyzed ejaculates produced through masturbation with stimulation from sexually explicit films. When males were exposed successively to the same female six times, we saw no change in ejaculate parameters between the first and sixth exposures to the same female. However, ejaculate volume and total motile sperm count significantly increased when males were exposed to a novel female. Time to ejaculation also decreased significantly upon exposure to a novel female. Thus, our results suggest that human males ejaculate more quickly and invest more in ejaculates with novel females.

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Section: Discussionmentioning

confidence: 99%

Men Ejaculate Larger Volumes of Semen, More Motile Sperm, and More Quickly when Exposed to Images of Novel Women

Joseph

Sharma

Agarwal

et al. 2015

Evolutionary Psychological Science

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“…Ejaculates were collected with exactly 4 days of abstinence each time. All patients collected their own ejaculates using the seminal collection device (SOD) at intercourse (Zavos 1985 ;Zavos 1987 ;Zavos and Goodpasture 1989).…”

Section: Methodsmentioning

confidence: 99%

Improvements in Qualitative Characteristics of Cryopreserved Human Spermatozoa Following Recovery via the SpermPrep II Filtration Method.

Zavos

Sofikitis²,

Toda³

et al. 1991

Tohoku J. Exp. Med.

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Motile, morphologically normal human spermatozoa can be separated from semen via a disposable SpermPrepTM filtration method. This method was employed with great success using frozen-thawed spermatozoa. The present study examined the qualitative characteristics of filtered spermatozoa via a new SpermPrepTMII filtration method in conjunction with the short-term freeze preservation of these spermatozoa. The isolation procedure yielded populations of spermatozoa with very high percentage motility and progressive motility grade (0-4) and which were free of seminal debris. For 20 semen samples the prefreeze values of percentage of motility and grade for the fresh and post-filtered were 58.6% and 3.1 vs 84.1% and 3.6, respectively. The sperm freeze preservation procedure involved dilution of the spermatozoa in Test-Yolk buffer (TYB) with 7% glycerol (v/v) and freezing and thawing in a conventional manner. Post-thaw percent motility, and survival % were substantially higher (p <0.05) for the filtered fraction than for the parent semen. The filtered fractions yielded postthaw mean values of motility percent and grade of 68.9 and 3.4 vs 47.6 and 3.0 for the parent semen, respectively. Survival following incubation at 37°C for 3 hours yielded respective values of 75.9% and 53.2% (p <0.05). It was concluded that the major factor in improving post-thaw quality recovery overall was the filtration via the SpermPrepTMII as applied in this study. This technique could have significant clinical applications in the use of frozen-thawed specimens for noncoital reproduction purposes. semen preparation ; SpermPrepTRII ;

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“…For example, men who are more sexually aroused express greater copulatory interest (Ariely & Loewenstein, 2006) and produce more competitive ejaculates (Zavos, 1985;Zavos & Goodpasture, 1989). Furthermore, men who are experimentally sexually aroused report a greater likelihood of performing sexually aggressive behaviors (Ariely & Loewenstein, 2006).…”

Section: Sexual Arousalmentioning

confidence: 99%

Human Sperm Competition: A Comparative Evolutionary Analysis

Pham¹,

Shackelford²

2014

ABC

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-Sperm competition occurs when a female copulates with two or more males within a sufficiently brief time period, resulting in sperm of the different males competing to fertilize ova. Sperm competition has been documented or inferred to occur across several species. We address the evidence for sperm competition in humans by reviewing literature indicating apparently convergent adaptations to sperm competition in humans and nonhumans. We discuss future research directions, and conclude that the evidence for anatomical, biological, physiological, and behavioral adaptations to human sperm competition provides compelling evidence that sperm competition has been a recurrent feature of human evolutionary history.

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Clinical improvements of specific seminal deficiencies via intercourse with a seminal collection device versus masturbation

Cited by 68 publications

References 3 publications

Men Ejaculate Larger Volumes of Semen, More Motile Sperm, and More Quickly when Exposed to Images of Novel Women

Men Ejaculate Larger Volumes of Semen, More Motile Sperm, and More Quickly when Exposed to Images of Novel Women

Improvements in Qualitative Characteristics of Cryopreserved Human Spermatozoa Following Recovery via the SpermPrep II Filtration Method.

Human Sperm Competition: A Comparative Evolutionary Analysis

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