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Equine reproduction III. Proceedings of the Third International Symposium on Equine Reproduction. University of Sydney, January 1982.

Rowlands, I W; Allen, W R; Rossdale, P D.

J Reprod Fertil Suppl ; 32: 1-660, 1982.

Article in English | MEDLINE | ID: mdl-6962846

Subject(s)

Horses/physiology , Reproduction , Animals , Female , Male , Pregnancy , Pregnancy, Animal

Perspectives in perissodactyls.

Rowlands, I W.

Equine Vet J ; 13(2): 85-7, 1981 Apr.

Article in English | MEDLINE | ID: mdl-7250110

ABSTRACT

The world-wide foaling rate in the mare is low and in the Hannoverian breed has remained asymptotic at about 50 per cent for over 150 years. In an attempt to discover some of the possible reasons for this low fertility rate, the evolutionary history of the perissodactyls, the odd-toed ungulates, is reviewed here. Of the 156 genera of this order, 152 are in the fossil record; this gives them the highest extermination rate of all the mammal groups. Some of the unusual and unique features of the reproductive physiology of the mare and their possible association with low fertility are considered.

Subject(s)

Fertility , Perissodactyla/physiology , Animals , Biological Evolution , Horses/physiology , Sexual Behavior, Animal

Spermatozoa in the genital ducts of the African elephant, Loxodonta africana.

Jones, R C; Rowlands, I W; Skinner, J D.

J Reprod Fertil ; 41(1): 189-92, 1974 Nov.

Article in English | MEDLINE | ID: mdl-4431010

Subject(s)

Elephants/anatomy & histology , Genitalia, Male/anatomy & histology , Spermatozoa , Africa , Animals , Cell Count , Cell Differentiation , Epididymis/anatomy & histology , Male , Microscopy, Electron , Spermatogenesis , Spermatozoa/ultrastructure

Proceedings: The rôle of the urogenital ducts of the African elephant, Loxodonta africana.

Jones, R C; Skinner, J D; Rowlands, I W.

J Reprod Fertil ; 36(2): 441-2, 1974 Feb.

Article in English | MEDLINE | ID: mdl-4819328

Subject(s)

Elephants/physiology , Wolffian Ducts/physiology , Animals , Cell Count , Cell Movement , Connective Tissue , Male , Microscopy, Electron , South Africa , Spermatozoa , Wolffian Ducts/anatomy & histology

Histological and biochemical studies on the ovary and of progesterone levels in the systemic blood of the green acouchi (Myoprocta pratti).

Rowlands, I W; Tam, W H; Kleiman, D G.

J Reprod Fertil ; 22(3): 533-45, 1970 Aug.

Article in English | MEDLINE | ID: mdl-5453382

Subject(s)

Ovary/anatomy & histology , Progesterone/metabolism , Rodentia/anatomy & histology , Animals , Corpus Luteum/analysis , Corpus Luteum/anatomy & histology , Corpus Luteum/metabolism , Female , Fetus , Ovarian Follicle , Ovary/analysis , Pregnancy , Progesterone/blood

Induction of ovulation in the lion, Panthera leo.

Rowlands, I W; Sadleir, R M.

J Reprod Fertil ; 16(1): 105-11, 1968 Jun.

Article in English | MEDLINE | ID: mdl-5691158

Subject(s)

Animals, Zoo , Carnivora , Chorionic Gonadotropin/pharmacology , Gonadotropins, Equine/pharmacology , Ovulation/drug effects , Animals , Female , Gonadotropins/therapeutic use , Infertility, Female/veterinary , Ovulation/physiology

Corpus luteum function in the guinea-pig; arterial and luteal progesterone levels, and the effects of hysterectomy and hypophysectomy.

Heap, R B; Perry, J S; Rowlands, I W.

J Reprod Fertil ; 13(3): 537-53, 1967 Jun.

Article in English | MEDLINE | ID: mdl-6029180

Subject(s)

Corpus Luteum/physiology , Guinea Pigs , Progesterone/blood , Animals , Female , Hypophysectomy , Hysterectomy , Organ Size , Ovary/metabolism , Pregnancy

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