Studies on the electrical resistance of cervical mucus and its relation to fertility in the cow (Preliminary report)

Objective of the study was the investigation of the response of Skopelos, Zakynthos and Kymi ewes to oestrus induction treatment. Furthermore, feasibility of measuring electrical resistance of cervical mucus for oestrus detection was examined. Oestrus was induced by intravaginal insertion of sponges impregnated with 60 mg medroxyprogesterone acetate for 12 days [groups: Skopelos (n=17), Zakynthos (n=18), Kymi (n=22)], followed by intramuscular injection of 400 iu equine chorionic gonadotropins) at the time of withdrawal. Blood samples were collected 10 days before sponge insertion, at insertion and withdrawal and at oestrus for measurement of oestradiol 17-β and progesterone concentration. Electrical resistance of cervical mucus was measured after οestrus detection, then ewes were mated. Proportion of Zakynthos ewes (100%) in oestrus was greater than that of Kymi (64%) or Skopelos (78%) ewes. Pregnancy rate ranged from 50% (Kymi ewes) to 67% (Skopelos ewes). Electrical resistance of cervical mucus of ewes that conceived was significantly smaller than of those that did not. Based on results of progesterone blood concentration measurement 10 days before and at sponge insertion, only Kymi ewes were at full anoestrus, whilst Zakynthos and Skopelos ewes were in the breeding season. Progesterone blood concentration at sponge withdrawal and oestradiol 17-β blood concentration at oestrus were significantly greater in Zakynthos ewes that conceived compared to those in ewes that did not conceive. Furthermore, progesterone concentration at sponge insertion was significantly greater in all ewes that conceived compared to that in ewes that did not. There were significant differences in oestradiol-17β and progesterone blood concentrations among breeds and at the various time-points of blood collection. It is concluded that response of the above sheep breeds to oestrus induction was satisfactory. Hormonal status of ewes during sponge insertion is of importance for conception. Measurement of electrical resistance of cervical mucus could be useful for selection of ewes for mating, even if rams used to detect oestrous.

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Studies on the electrical resistance of cervical mucus in the Cow

The Japanese journal of animal reproduction ◽

10.1262/jrd1955.15.8 ◽

1969 ◽

Vol 15 (1) ◽

pp. 8-13

Author(s):

Yukio SATO

Keyword(s):

Electrical Resistance ◽

Cervical Mucus

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Lenticular opacities in glaucoma patients receiving echothiophate iodide therapy. Preliminary report

JAMA ◽

10.1001/jama.195.8.664 ◽

1966 ◽

Vol 195 (8) ◽

pp. 664-666 ◽

Cited By ~ 1

Author(s):

A. De Roetth

Keyword(s):

Preliminary Report

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Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

Symposium - International Astronomical Union ◽

10.1017/s0074180900100907 ◽

1967 ◽

Vol 31 ◽

pp. 177-179

Author(s):

W. W. Shane

Keyword(s):

Preliminary Report ◽

Progress Report ◽

Galactic Centre ◽

Low Latitude ◽

The Third ◽

Introductory Lecture ◽

Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

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Preliminary Report of a Comparative Study of Seminiferous Tubular Epithelium from Rats Flown on Cosmos 1887 and SL3

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103449 ◽

1988 ◽

Vol 46 ◽

pp. 276-277

Author(s):

Walter J. Sapp ◽

D.E. Philpott ◽

C.S. Williams ◽

K. Kato ◽

J. Stevenson ◽

...

Keyword(s):

Space Flight ◽

Physiological Response ◽

Preliminary Report ◽

Complete Recovery ◽

Environmental Constraints ◽

Tubular Epithelium ◽

Testicular Weight ◽

Testicular Morphology ◽

Normal Offspring ◽

Rats And Mice

Space flight, with its unique environmental constraints such as immobilization, decreased and increased pressures, and radiation, is known to affect testicular morphology and spermatogenesis. Selye, summarized the manifestations of physiological response to nonspecific stress and he pointed out that atrophy of the gonads always occurred. Reports of data collected from two dogs flown in space for 22 days (Cosmos 110) indicate that there was an increase of 30 to 70% atypical spermatozoa when compared to ground based controls. Seventy-five days after the flight the abnormalities had decreased to the high normal value of 30% and mating of these dogs after this period produced normal offspring, suggesting complete recovery. Effects of immobilization and increased gravity were investigated by spinning rats and mice at 2x g for 8-9 weeks. A decrease in testicular weight was noted in spun animals when compared to controls. Immobilization has been show to cause arrest of spermatogenesis in Macaca meminstrins.

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