
%0 Journal Article
%A Jochle, W 
%T Forty years of control of the oestrous cycle in ruminants: progress made, unresolved problems and the potential impact of sperm encapsulation technology
%J Reproduction, Fertility and Development
%D 1993/12/01
%V 5
%N 6
%P 587-594
%K 
%R https://doi.org/10.1071/RD9930587
%U https://www.publish.csiro.au/paper/RD9930587 
%X Pharmacological control of the oestrous cycle may, with or without sperm encapsulation, remain an indispensable part of any attempt to make artificial insemination available to the ranch-cattle industry. Of the current methods, those most likely to remain acceptable with regulatory agencies and to gain acceptance with industry are those involving the short-term use (7-10 days) of minimal effective doses of progestins (preferably progesterone) and the subsequent use of an analogue of prostaglandin F2 alpha. The use of microencapsulated sperm with a long lifespan would allow artificial insemination to be achieved without reference to the time when heat and ovulation may occur. 
