Heat in male contraception (hot water 60 °C, infrared, microwave, and ultrasound)

Fahim, M.S.; Fahim, Z.; Der, R.; Hall, David G.; Harman, Joan

doi:10.1016/0010-7824(75)90109-2

Cited by 41 publications

(38 citation statements)

References 6 publications

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“…Varma and Traboulay [ 19761 also reported time-intensity-dependent alterations in mouse germinal cells exposed to 1,700-MHz radiation at SARs of 15 W/kg or greater. Effects of RF radiation on testicular tissue and testicular function also have been reported by Gunn et al [1961], Ely and co-workers [1964], Muraca et al [1976], Fahim et al [1975], Cairnie et al [1980a,b], Berman et al [1980], and Lebovitz and Johnson [1983, 19871. The results of in vivo studies indicate the possibility of involvement of RF-induced heating in testicular alterations.…”

Section: Introductionmentioning

confidence: 56%

“…Because it has been determined that spermatozoa, the most mature cells in the spermatogenic cycle, are most sensitive to heat [Van Demark and Free, 19701, the results of Fahim et al [1975] indicate that temporary sterility may have been due to an RF-induced temperature effect on spermatozoa, rather than on other spermatogenic cells. The results of temperature-controlled studies shown in Figure 2 are not inconsistent with the results of Fahim et al [1975]. A 1-h sham exposure of spermatozoa caused a temperature-dependent reduction in in vitro fertilization.…”

Section: Discussionmentioning

confidence: 97%

“…Logically, even qualitative comparisons must be restricted to in vivo studies of RF-induced alteration of functional fertility, the dependent variable used in our in vitro study. Fahim et al [1975] reported that exposure of rats to 2,450-MHz radiation, which resulted in a testicular temperature of 65 "C for 5 min, or an elevation to 45 "C for 15 min, caused complete infertility for 10 months. The …”

Section: Discussionmentioning

confidence: 98%

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In vitro fertilization of mouse ova by spermatozoa exposed isothermally to radio‐frequency radiation

Cleary

Liu

Graham

et al. 1989

Bioelectromagnetics

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Mouse spermatozoa were exposed in vitro for 1 h to 27- or 2,450-MHz CW RF radiation at SARs of 0 to 90 W/kg under isothermal (37 +/- 0.2 degrees C) conditions. Exposure at either frequency to RF radiation at SARs of 50 W/kg or greater resulted in a statistically significant reduction in the ability of irradiated sperm to fertilize mouse ova in vitro (P less than .05). Over the range of SARs there was no apparent difference in the effects of 27- vs. 2,450-MHz RF radiation. There were no readily detectable exposure effects on spermatozoan morphology, ultrastructure, or capacitation. The reduction of in vitro fertilization is attributed to a direct effect of RF radiation on spermatozoa rather than to heating.

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Section: Introductionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

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In vitro fertilization of mouse ova by spermatozoa exposed isothermally to radio‐frequency radiation

Cleary

Liu

Graham

et al. 1989

Bioelectromagnetics

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“…La comparaison des moyennes du volume spermatique avant et apr~s cure de varicocble n'a montr6 aucune diff6rence statistiquement significative et ceci, quelque soit le degr6 de la varicocble et quelque soit l'intervalle de temps aprbs la cure (Tableau 1). Ces r6sultats 6taient publi6s par d'autres auteurs [10,11]. …”

Section: Volume Spermatiqueunclassified

Effets à court et à long termes de la cure de varicocèle sur les caractéristiques spermatiques

Ajina

Amor

Mehdi

et al. 2002

Androl.

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RI~SUMI~Nous avons ~tudie los caracteristiques spermatiques chez 122 patients, avant cure de varicocele et 3 mois, 6 mois, 9 mois et 12 mois apres, dans le but de degager un profil spermatique chez ces porteurs de varicocele et d'etudier les effets de ce traitement sur leurs spermes. II ressort de notre etude que les porteurs de varicoc~le ont globalement un sperme asth~nozoospermique severe.Sur les 122 patients etudi~s, -18 % sont oligozoospermiques extremes, -26 % sont oligozoospermiques s~v~res, -18 % sont oligozoospermiques moderns, -38 % sont normospermiques.La cure de varicocele n'intervient ni sur le volume du sperme, ni sur la vitalit~ des spermatozoi'des, ni sur leur survie, ni sur leur taux de formes anormales, ni sur les marqueurs du tractus g~nital masculin, mais elle am6liore d'une fa~:on statistiquement significative la numeration et la mobilit6 et ce, chez les oligozoospermiques extr6mes ou severes.Ceci justifie ce type de traitement dans les cas des oligoasth~nozoospermies extr6mes ou s~v~res dans le but d'obtenir une grossesse naturelle, si non d'augmenter les chances de r6ussite des techniques d'assistance m~dicale & la procreation. I. I N T R O D U C T I O NLa varicoc~le a dt6 pendant longtemps incriminde dans les hypofertilit6s masculines. Sa frdquence est de 21 ~ 4 1 % chez les hommes infertiles et de 4 i 22% dans la population g6n@ale [25]. Les m6canismes physiopathologiques de cette affection sont mal connus; ce qui a laiss6 les avis trbs controvers6s quant ~t la conduite ~t tenir devant un homme hypofertile porteur de varicocble.Les hypotheses les plus plausibles sont : le d6rbglement de la tempdrature testiculaire, la stase sanguine et le reflux des m6tabolites r6naux et surr6naliens [12,13,15].Une varicocNe peut ~tre primaire ou secondaire. La varicocNe secondaire est rare, elle survient le plus souvent i droite et elle est due ~t une compression ou une obstruction de la veine spermatique (tumeur, ad6nopathie pelvienne, thrombose de la veine rdnale). La varicocble primaire est la plus frdquente, associde souvent it nne hypofertilit& Le c6t6 gauche est atteint dans 70 ~ 100% des cas, la bilatdralit6 est not6e dans 23% des cas et le c6t6 droit est rarement touch6 (0 i 9%) [25].Les objectifs de cette 6tude sont essentiellement d'dtablir le profil spermatique des porteurs de varicocble et d'analyser les effets de la cure chirurgicale de la varicocNe stir les variables spermiologiques. M o t s cles : Biologie clinique, fertilit& urologie, varicocele, s p e r m o g r a m m e

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“…Diagnostic ultrasound is also used in determining the etiology of uterine bleeding and in the evaluation of such things as the implantation site of an early gestation, ovarian tumors, uterine fibroids, migrating IUDs and congenital uterine abnormalities. Recently, ultrasound was more effective as a suppressant of spermatogenesis in male rats [3] and in dogs, cats, monkeys, and man [4] at 39°C than hot water, infrared, and microwave.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasound on Testicular Electrolytes (Sodium and Potassium)

Fahim

Azzazi

1978

Archives of Andrology

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The testes of 50 rats were placed in a cup filled with water and received 1 Wicm' of ultrasound for 15 min. Fluid was collected from the seminiferous tubules and rete testis of the treated and control groups at 1, 8, 12, and 24 hr intervals. Ultrasound increased the sodium concentration in the fluid of the seminiferous tubules, decreased the sodium concentration in the fluid of the rete testis, increased the potassium concentration in the fluid of the rete testis, and decreased the potassium concentration in the fluid of the seminiferous tubules.Fourteen, slightly sedated, monkeys (Macaca fuscic.ularis) were treated with % W/cm2 of ultrasound for 30 min. Water was used as the coupling agent for seven monkeys and 3% NaCl was used as the coupling agent for the other seven monkeys. The efficacy of ultrasound treatment in reducing sperm count to zero and achieving zero motility was increased when 3% NaCl was used. Sperm count was at the level of presonication after 20 weeks when water was used as a coupling agent.

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Heat in male contraception (hot water 60 °C, infrared, microwave, and ultrasound)

Cited by 41 publications

References 6 publications

In vitro fertilization of mouse ova by spermatozoa exposed isothermally to radio‐frequency radiation

In vitro fertilization of mouse ova by spermatozoa exposed isothermally to radio‐frequency radiation

Effets à court et à long termes de la cure de varicocèle sur les caractéristiques spermatiques

Effect of Ultrasound on Testicular Electrolytes (Sodium and Potassium)

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