Spermatozoa in the Genital Tract of the Ewe II. Distribution After Coitus

Mattner, P. E.

doi:10.1071/bi9630687

Cited by 54 publications

(34 citation statements)

References 8 publications

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“…The number of spermatozoa in the cervix of the mated ewe seems to be maximal at about 15 min after coitus and although it soon begins to decline, it always remains greater than the number in the uterus (Mattner 1963). The restriction on spermatozoan progression from the cervical canal into the vagina or the uterus probably prevents too rapid dispersal of the established spermatozoan population.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies (Mattner 1963) indicated that slow progression of spermatozoa from the cervix to the fallopian tube of the ewe may occur for 24 hr or more after coitus, irrespective of the occurrence or failure of initial rapid spermatozoan transport. Slow, continuous transport of spermatozoa to the tubes is likely to be of considerable importance in maintaining a population of viable spermatozoa within the fallopian tubes of the inseminated ew.e over a prolonged period, for the life of the spermatozoa in the tube is evidently short (Quinlan, Mare, and Roux 1933;Edgar and AsdellI960).…”

Section: Introductionmentioning

confidence: 99%

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Spermatozoa in the Genital Tract of the Ewe III. The Role of Spermatozoan Motility and of Uterine Contractions in Transport

Mattner¹

1963

Aust. Jnl. Of Bio. Sci.

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SummaryLaparotomy was performed on 28 oestrous ewes and either live or dead spermatozoa were deposited in the fallopian tubes or in one uterine horn.Dead spermatozoa appeared to be transported from the cranial extremity of one uterine horn to the body of the uterus and into the contralateral uterine horn as readily as were live spermatozoa but did not pass from the uterus to the fallopian tubes as freely as did the latter. Live spermatozoa passed from the uterus into the cervical canal more freely than did dead spermatozoa but only a small number, relative to the number present in the uterus, was recovered from the caudal portion of the cervix.Mter spermatozoa were deposited in both fallopian tubes, small numbers were recovered from the uteri when live (but not dead) spermatozoa were introduced.The importance of the cervix and the uterotubal junction in limiting the number of spermatozoa that pass in either direction is discussed in relation to the continuity of transport from the cervix to the fallopian tubes in the vaginally insemi· nated ewe. Observations On the survival of spermatozoa in the uterus and fallopian tubes are also presented.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spermatozoa in the Genital Tract of the Ewe III. The Role of Spermatozoan Motility and of Uterine Contractions in Transport

Mattner¹

1963

Aust. Jnl. Of Bio. Sci.

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“…In this manner, preliminary conclusions have been drawn as to how soon after mating a population of spermatozoa competent to ensure fertilisation might have entered the oviducts. This general approach has been used previously in a small number of sheep (Dauzier, 1958) (see Schott and Phillips, 1941 ;Starke, 1949 ;Mattner, 1963 ;Mattner and Braden, 1963) (Overstreet and Cooper, 1978). In a recent review of the subject (Hunter, 1980 0 ) (Harper, 1973 ;Cooper, 1975, 1978 …”

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confidence: 99%

Transport of spermatozoa in the ewe : timing of the establishment of a functional population in the oviduct

Hunter¹,

Nichol²,

Crabtree³

1980

Reprod. Nutr. Dévelop.

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Summary. The technique of post-coital transection of the oviducts from the uterus at various intervals after mating has been used to establish how soon a population of spermatozoa competent to fertilise the egg(s) first appears in the oviduct of the ewe. Fertilised eggs were not found as a sequel to transection at 4 or 6 hrs after mating, whereas the incidence of fertilisation irt a small series of ewes was 30 p. 100 following transection at 8 hrs and 100 p. 100 at 10 hrs. The mean number of spermatozoa associated with the zona pellucida at these later times increased from 2 to 13.4. The results are interpreted as indicating only a gradual progression of viable spermatozoa from the cervix to the oviduct, although the possible contribution of a rapid phase of sperm transport to the events of fertilisation is discussed. Finally, the isthmus rather than the cervix is reasoned to act as the functional sperm reservoir at the time of ovulation, with some form of peri-ovulatory programming of sperm release from this region of the tract. ' Introduction.

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“…In the ewe, adverse environmental stimuli increase uterine activity [3,49], and this 'stress' effect may affect fertility [17,31,46]. In experiment 1, plasma CORT was measured, since it is accepted that changes in circulating CORT concentrations constitute a sensitive index of the response to environmental stimuli [7].…”

Section: Discussionmentioning

confidence: 99%

“…On the contrary, an impairment of sperm transport has also been reported in manipulated ewes [31,46], which was attributed to a stress effect during handling for AI [17]. Using electromyography, Van der Weyden [49] reported that environmental disturbances during estrus (such as the presence of an observer in the stable) induced an increase in uterine activity.…”

Section: Introductionmentioning

confidence: 99%

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

et al. 2002

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-The objective was to compare in the ewe the effects of easy and difficult procedures for artificial insemination (AI) (as related to rapid or poor accessibility of the cervix, respectively) on plasma cortisol (CORT) and oxytocin (OT), and uterine motility. All AI were simulated using a catheter empty of semen to study genital and environmental stimuli only. In experiment 1, 40 ewes were sampled after AI, and whether it was an easy or difficult procedure was reported for each animal. While CORT concentrations rose to a similar amount in all ewes, whatever the AI procedure, a significant OT response occurred after a difficult procedure only (n = 18) (17.4 ± 1.7 versus 12.7 ± 0.7 pg . mL -1 before AI, p < 0.05). In experiment 2, uterine activity was monitored in 4 ewes using an implantable telemetric transmitter equipped with an intrauterine pressure catheter. An increased uterine activity occurred during 2 ± 1 min after an easy AI (n = 5), whereas the evoked activity lasted for 15 ± 4 min after a difficult AI (p < 0.001, n = 7). A similar long-lasting response occurred after OT administration (100 mIU, i.v.). We concluded that the increase in uterine motility after a difficult AI resulted from a reflex release of OT, and not to a "stress" effect.artificial insemination / cortisol / oxytocin / uterine contractions / telemetry Reprod. Nutr. Dev. 42 (2002) [381][382][383][384][385][386][387][388][389][390][391][392] 381

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Spermatozoa in the Genital Tract of the Ewe II. Distribution After Coitus

Cited by 54 publications

References 8 publications

Spermatozoa in the Genital Tract of the Ewe III. The Role of Spermatozoan Motility and of Uterine Contractions in Transport

Spermatozoa in the Genital Tract of the Ewe III. The Role of Spermatozoan Motility and of Uterine Contractions in Transport

Transport of spermatozoa in the ewe : timing of the establishment of a functional population in the oviduct

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

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