Release of an Oxytocic Substance Following Genital Stimulation in Bulls

Sharma, Om P.; Hays, R. L.

doi:10.1530/jrf.0.0350359

Cited by 51 publications

(23 citation statements)

References 3 publications

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“…Sexual preparation also induces the release of oxytocin (Sharma & Hays, 1973) which, if injected before ejaculation into an artificial vagina, increases the sperm output of rams, bulls and rabbits (Kihlstrom & Melin, 1963;Knight & Lindsay, 1970; Knight, 1974a;Schefels & ElAzab, 1975;Voglmayr, 1975;Agmo et al, 1978). Presumably, oxytocin stimulates smooth muscle contractility (Knight, 1972(Knight, , 1974b, thereby enhancing sperm transport within the extragonadal ducts before and/or during ejaculation.…”

Section: Introductionmentioning

confidence: 99%

Spermatogenesis, sperm output and seminal quality of Holstein bulls electroejaculated after administration of oxytocin

Berndtson¹,

Igboeli²

1988

Reproduction

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Summary. The 12-to 24-month-old Holstein bulls were electroejaculated twice on each of 3 days per week throughout the study. After a 2-week stabilization period and subsequent 2-week pre-treatment period, 7 bulls were given 50 i.u. oxytocin via the jugular vein 10 min before each first ejaculate for 10 weeks. The 7 control bulls were handled identically but did not receive oxytocin. All bulls were castrated at the end of the study. Oxytocin was without effect on spermatogenesis (P > 0\m=.\10).Oxytocin did not alter the total number of spermatozoa harvested per collection day (P > 0\m=.\10), but increased the number of spermatozoa in first ejaculates by an average of 34\m=.\2% (P < 0\m=.\025).Oxytocin did not affect sperm quality (P > 0\m=.\10) as judged by the motility of spermatozoa in fresh semen or by the motility or percentage of spermatozoa with intact acrosomes in thawed semen. It is concluded that 50 i.u. oxytocin enhanced sperm output in first ejaculates of electroejaculated bulls without altering daily sperm production or seminal quality.

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Section: Introductionmentioning

confidence: 99%

Spermatogenesis, sperm output and seminal quality of Holstein bulls electroejaculated after administration of oxytocin

Berndtson¹,

Igboeli²

1988

Reproduction

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“…Sexual preparation entails administering procedures such as teasing, false mounting or active restraint before ejaculation. Such procedures cause a release of oxytocin and possibly other hormones, which, in turn, enhance sperm transport or emission from the extragonadal ducts (Sharma andHays, 1973, Berndtson andIgboeli, 1988). False mounting consists of allowing the male to mount a teaser animal or dummy while the penis is deflected to prevent penetration of the reproductive tract or artificial vagina.…”

Section: Sexual Preparation and Sperm Outputmentioning

confidence: 99%

Sperm preparation for fertilization.

Gadella¹

2014

Animal Andrology: Theories and Applications

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“…The latter suggestion is supported by a study showing that restraint of bulls or false mounts prior to semen collection increases the number of motile spermatozoa by as much as 50% (Salisbury & Vandermark, 1961). Furthermore in bulls, it has been suggested that oxytocin and prostaglandin F2a may be at least partly responsible for the improvement of the ejaculate after sexual stimulation (Hafs et al, 1962;Sharma & Hays, 1973).…”

Section: The Development Of In Vivo Studiesmentioning

confidence: 99%