Pregnancy diagnosis in cows and heifers by determination of oestradiol-17α in faeces

Möstl, Erich; Choi, H. S.; Wurm, W. Heinrich; Ismail, Neveen Adel Amer; Bamberg, E.

doi:10.1016/0007-1935(84)90115-5

Cited by 46 publications

(13 citation statements)

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“…Concentrations significantly increased at 12 weeks, to a mean of 9.67 µg/g, until a couple of days following parturition; this was expected based on reports in the mohor gazelle, which also exhibited a rise to a mean value of 23.56 µg/g, occurring at week 10 of gestation [17]. Fecal estrogens also increased significantly during the latter part of gestation, likely in preparation for parturition, similar to that observed in a number of other ungulate species [41,42,43].…”

Section: Discussionsupporting

confidence: 81%

Non-invasive hormonal characterization of the ovarian cycle, pregnancy, and seasonal anestrus of the female addra gazelle (Nanger dama ruficollis)

2017

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Non-invasive fecal hormone metabolite monitoring was used to characterize the estrous cycle, pregnancy, and seasonal anestrus of the critically endangered addra gazelle (Nanger dama ruficollis). With less than 250 animals remaining in the wild and ∼168 individuals managed in captivity, it is crucial to maintain sustainable populations. Progestogen and estrogen profiles were obtained from analysis of fecal samples collected approximately every other day, within varying intervals, over the course of 7 years (n = 8 adult females). Average estrous cycle length was 19.5 ± 0.4 days (range, 14-26 days), with a luteal phase length of 14.6 ± 1.2 days (range, 10-16 days), and an inter-luteal period of 5.2 ± 1.4 days (range, 2-7 days). Mean gestation length for six pregnancies was 200.7 ± 0.4 days (range, 200-202 days). Fecal progestogens increased at 12 weeks of gestation and remained elevated until parturition. Addra gazelle females exhibited a period of seasonal anestrus with consistently low progestogen concentrations and no cyclic activity from about September to March. Analysis of reproductive and climate records demonstrated a peak in U.S. births that coincided with maximal rainfall in the native habitat of the addra gazelle. Results show that estrous cycle, luteal phase, and inter-luteal phase lengths in addra are similar to those observed in other gazelle species, however, to our knowledge, this is the first study to demonstrate seasonal anestrus in the Nanger genus.

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Section: Discussionsupporting

confidence: 81%

Non-invasive hormonal characterization of the ovarian cycle, pregnancy, and seasonal anestrus of the female addra gazelle (Nanger dama ruficollis)

2017

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“…Noninvasive methods of measuring fecal steroid metabolites to assess an animal's endocrine status were pioneered in the late 1970s (birds1) and early 1980s (mammals2,3) and have been established during the past two decades in an increasing number of species. These methods are now widely used to investigate hormon‐behavior relationships, as well as questions in the fields of reproduction, animal welfare, ecology, conservation biology, and biomedicine (for a review, see Refs.…”

Section: Introductionmentioning

confidence: 99%

Measuring Fecal Steroids: Guidelines for Practical Application

Palme

2005

Annals of the New York Academy of Sciences

438

387

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During the past 20 years, measuring steroid hormone metabolites in fecal samples has become a widely appreciated technique, because it has proved to be a powerful, noninvasive tool that provides important information about an animal's endocrine status (adrenocortical activity and reproductive status). However, although sampling is relatively easy to perform and free of feedback, a careful consideration of various factors is necessary to achieve proper results that lead to sound conclusions. This article aims to provide guidelines for an adequate application of these techniques. It is meant as a checklist that addresses the main topics of concern, such as sample collection and storage, time delay extraction procedures, assay selection and validation, biological relevance, and some confounding factors. These issues are discussed briefly here and in more detail in other recent articles.

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“…In mammals and birds, the determination of gonadal steroid and corticosteroid metabolites in feces allows gender determination (Bishop and Hall, 1991;Cockrem and Rounce, 1994;Hurst et al, 1957), facilitates monitoring of reproductive status in zoo animals and domestic livestock (Bercovitz et al, 1982;Hultén et al, 1995;Kirkpatrick et al, 1990;Lucas et al, 1991;Mö stl et al, 1984;Palme et al, 1996;Schwarzenberger et al, 1992;Ziegler et al, 1988), and is a valuable tool for monitoring stress (Altmann et al, 1995;Bujalska et al, 1994;Cook et al, 1996;Creel et al, 1997;Goymann et al, 1999;Kotrschal et al, 1998;Miller et al, 1991, Wasser et al, 1997. Excreted steroid metabolites may covary with social factors (Hirschenhauser et al, 1999a(Hirschenhauser et al, ,b, 2000Kotrschal et al, 1998;McLeod et al, 1991;Oliveira et al, 1996;Wingfield et al, 1997).…”

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confidence: 99%

Seasonal Relationships between Plasma and Fecal Testosterone in Response to GnRH in Domestic Ganders

Hirschenhauser

Möstl

Péczely

et al. 2000

General and Comparative Endocrinology

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Pregnancy diagnosis in cows and heifers by determination of oestradiol-17α in faeces

Cited by 46 publications

References 8 publications

Non-invasive hormonal characterization of the ovarian cycle, pregnancy, and seasonal anestrus of the female addra gazelle (Nanger dama ruficollis)

Non-invasive hormonal characterization of the ovarian cycle, pregnancy, and seasonal anestrus of the female addra gazelle (Nanger dama ruficollis)

Measuring Fecal Steroids: Guidelines for Practical Application

Seasonal Relationships between Plasma and Fecal Testosterone in Response to GnRH in Domestic Ganders

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