By Richard M. Hopper
Bovine Reproduction is a entire, present reference delivering info on all facets of replica within the bull and cow. providing basic wisdom on comparing and restoring fertility within the bovine sufferer, the booklet additionally locations details within the context of herd health and wellbeing the place acceptable for a really international view of bovine theriogenology. revealed in complete colour all through, the ebook comprises eighty three chapters and greater than 550 photos, making it the main exhaustive reference to be had in this topic.
Each part covers anatomy and body structure, breeding administration, and reproductive surgical procedure, in addition to obstetrics and being pregnant wastage within the cow. Bovine Reproduction is a welcome source for bovine practitioners, theriogenologists, and animal scientists, in addition to veterinary scholars and citizens with an curiosity within the cow.
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Sample text
In: Payne AH, Hardy MP (eds) The Leydig Cell in Health and Disease. Totowa, NJ: Humana Press, 2007, pp. 3–30. 27. Stewart D, Raeside J. Testosterone secretion by the early fetal pig testes in organ culture. Biol Reprod 1976;15:25–28. 28. Attal J. Levels of testosterone, androstenedione, estrone and estradiol-17β in testes of fetal sheep. Endocrinology 1969;85:280–289. 29. Fawcett D, Neaves W, Flores M. Observations on intertubular lymphatics and the organization of the interstitial tissue of the mammalian testis.
Bremner W. Historical aspects of the study of the testis. In: Burger HG, de Kretser DM (eds) The Testis. New York: Raven Press, 1981, pp. 1–8. 4. de Graaf R. Treatise on the human reproductive organs (translated by Jocelyn and Setchell). J Reprod Fertil Suppl 1972;17:1–64. 5. Eik-Nes K. Biosynthesis and secretion of testicular steroids. In: Hamilton DW, Greep RO (eds) Handbook of Physiology, Section 7, Vol. V. Washington, DC: American Physiological Society, 1975, pp. 467–483. 6. Leydig F. Zur anatomie der manlichen geslechtsargane und analdrusen de saugethiere.
76 Estrogens are C18 steroids and are formed by the conversion of androgens by the aromatase enzyme system to produce estrone and estradiol from androstenedione and testosterone, respectively. 77 However, there is insufficient evidence to demonstrate that bull testis produces estrogens in the quantities found in the boar and stallion, nor is there evidence that the bull secretes much in 18 The Bull: Anatomy and Physiology the way of the Δ16-androstene steroids. 78 Androgens stimulate production of androgen-binding protein (ABP) by the Sertoli cells,79 and this acts as an intracellular carrier of testosterone and DHT within the Sertoli cells.