First findings of tubal ova in the cow, together with notes on oestrus

Hartman, Carl G.; Lewis, W. Arthur; Miller, Fred W.; Swett, W. W.

doi:10.1002/ar.1090480206

Cited by 35 publications

(14 citation statements)

References 6 publications

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“…The very earliest stages of bovine embryonic development (ovum and 2-cell embryo) were first described in 1931 by Hartman et al 1 In the following decade two other research groups 2,3 described and illustrated various stages of bovine embryonic development. These very early descriptions of embryonic development served as the foundation of the morphological embryo evaluation method that subsequently evolved and became widely used in the commercial bovine embryo transfer industry.…”

Section: History Of Bovine Embryo Evaluationmentioning

confidence: 99%

Evaluation ofIn Vivo‐Derived Bovine Embryos

Jahnke

West

Youngs

2014

Bovine Reproduction

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Section: History Of Bovine Embryo Evaluationmentioning

confidence: 99%

Evaluation ofIn Vivo‐Derived Bovine Embryos

Jahnke

West

Youngs

2014

Bovine Reproduction

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“…Oocytes and embryos were transferred surgically into the oviduct whereas embryo recovery was accomplished at slaughter or by non‐invasive collection of advanced embryonic stages from the uterine horns. Generally, access was achieved via the lumbar or midventral route; occasionally, ovariohysterectomy per vaginam was used for embryo collection via in vitro flushing of oviducts (Hartman et al. 1931; Roschlau et al.…”

Section: Morphological Properties To Access and Use The Bovine Oviducmentioning

confidence: 99%

Role of the Oviduct in Early Embryo Development

Besenfelder

Havlíček

Brem

2012

Reprod Domestic Animals

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Contents This review highlights the role of the oviduct in early embryo development, which has to fulfil many aligned and well‐tuned tasks during early embryogenesis. The oviductal lining is subjected to dynamic changes to timely accomplish gamete transport, fertilization and embryo development and to deliver a competent and healthy conceptus to the endometrium which can implant and develop to term. Although knowledge about the role of the oviduct is limited, we know that embryos are very sensitive to the environment in which they develop. The success of in vitro embryo production techniques demonstrates that it is possible to bypass the oviduct during early development and, to a certain extent, replicate the conditions in vitro. However, comparative studies show that embryos developed in vivo are superior to their in vitro produced counterparts, underlining our relatively poor knowledge of the biology of the oviduct. Oviduct activity is orchestrated by various factors, depending on cyclic dynamics, which crucially affect the success of tubal transfer and/or (re‐)collection of embryos in embryo transfer studies. This paper reviews data which demonstrate that in vivo culture of embryos in the bovine oviduct is a useful tool for the assessment of embryos developed under various conditions (e.g. superovulation vs single ovulation, lactating dairy cows vs non‐lactating cows). It is concluded that more work in the field of early embryo development within the oviduct would contribute to improved ART protocols leading to healthy pregnancies and offspring.

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“…Cattle eggs and embryos were first described in the report of Hartman et al (1931) and information on the chronological development of the egg in its early stages was provided by workers in the U.K. and France (Hamilton and Laing, 1946;Thibault, 1966Thibault, ,1967; in recenttimes, a great deal of information is presented in reviews (Betteridge, 1977(Betteridge, ,1980. A study of cattleeggsand embryos using light and electron microscopy is also reported by Brackett etal.…”

Section: Evaluation Of Egg and Embryomentioning

confidence: 99%

Embryo Transfer in Cattle

Gordon

1983

Controlled Breeding in Farm Animals

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First findings of tubal ova in the cow, together with notes on oestrus

Cited by 35 publications

References 6 publications

Evaluation ofIn Vivo‐Derived Bovine Embryos

Evaluation ofIn Vivo‐Derived Bovine Embryos

Role of the Oviduct in Early Embryo Development

Embryo Transfer in Cattle

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