Castration (including Cryptorchids and Caponing) and Ovariotomy
Author: Sir Frederick Thomas George Hobday
Publisher:
Published: 1914
Total Pages: 196
ISBN-13:
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Author: Sir Frederick Thomas George Hobday
Publisher:
Published: 1914
Total Pages: 196
ISBN-13:
DOWNLOAD EBOOKAuthor: Alick Drummond Buchanan Smith
Publisher: Springer
Published: 2013-11-11
Total Pages: 160
ISBN-13: 9401759561
DOWNLOAD EBOOKAuthor: Edward Lawrence Keyes
Publisher:
Published: 1906
Total Pages: 898
ISBN-13:
DOWNLOAD EBOOKAuthor: F. Hadziselimovic
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 145
ISBN-13: 3642860206
DOWNLOAD EBOOKFerment, a sign of progress in any scientific field, has previously been lacking in the area of cryptorchidism, where the only activity has been in improving operative methods. Now, however, profound changes in the care of boys with cryptorchidism are being brought about; ideas are arising from a fresh look at comparative anatomy, and histological and experimental observa tions are being supplemented by clinical tests made possible by new hormonal agents. The treatment of cryptorchidism begins with its recognition by the pediatri cian, who until now has shown little interest because of disappointing results from chorionic gonadotropin administration. As for the surgeon, his bent toward restoration of normal anatomical relationships has kept his attention focused on the development of better surgical technics to bring the recalci trant testis into the scrotum. Both specialists have avoided the primordial question of why the testis did not descend properly. If this were known they would treat the cause of cryptorchidism, and not be satisfied merely with trying to correct its end result. As one reads this book, one sees that in most patients cryptorchidism is not caused by some anatomical structure blocking the way or by some deformity of the testis interfering with the transport mechanism. Rather, deficiencies in the hormonal environment of the fetus retard the developmen tal sequences essential to the normal differentiation and descent of the testis. The clinical solution is thus to provide the deficient substances.
Author: John Victor Lacroix
Publisher:
Published: 1915
Total Pages: 152
ISBN-13:
DOWNLOAD EBOOKAuthor: Ian Gordon
Publisher: CABI
Published: 2004
Total Pages: 356
ISBN-13: 9780851990491
DOWNLOAD EBOOKIn the past half century great progress has been made in the reproductive management of farm animals, both mammals and birds. This book aims to review developments and indicate which reproductive technologies can be used commercially or in research. It begins by discussing artificial insemination and how this has recently been refined in semen sexing technology. Embryo transfer, in vitro embryo production technology and the control of oestrus and ovulation are then reviewed. Subsequent chapters consider the control of postpartum ovarian activity, seasonal breeding, multiple births and litter size, pregnancy testing, parturition, and the onset of puberty. The author then describes more recent developments in cloning and the production of transgenic animals, before a final chapter on suppressing reproductive activity.
Author: Anne FitzGerald Paramoure
Publisher:
Published: 1959
Total Pages: 100
ISBN-13:
DOWNLOAD EBOOKAuthor: Thomas O. Abney
Publisher: CRC Press
Published: 2020-08-11
Total Pages: 183
ISBN-13: 100010303X
DOWNLOAD EBOOKCurrent knowledge concerning both morphological and functional cryptorchid-related alterations in the various testicular compartments is summarized in this valuable new publication. Damage to the germinal epithelium and resulting infertility in both humans and experimental animals as well as the degree of damage to the different stages of germ cell development is discussed. In addition, information concerning hormonal therapy and orchidopexy to reverse cryptorchid-related damage is provided. Morphological alterations in Sertoli and Leydig cells is discussed in terms of cellular hypertrophy and hyperplasia, alterations in organelle number and characteristics as well as changes in cell-cell junctional complexes. Changes in Sertoli cell and Leydig cell function, including gonadotropin binding, steroidogenesis and other metabolic alterations is also outlined,as well as the influence of altered testicular function on subsequent hypothalamic-pituitary changes. Vascular disruption, the potential role of paracrine substances and direct thermal damage, all of which may be responsible for the resulting detrimental changes in one or more testicular compartments, are considered.