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Intra-ovarian regulation oocyte developmental competence in cattle
Published online by Cambridge University Press: 26 September 2008
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Each oestrous cycle the ovary produces one or more oocytes, depending on the species considered, which are fully competent to sustain the development of a new individual and are defined as matured. Ovulation is the terminal phase of a lengthy and complex selection process which enables only a minute proportion of the oocytes present in the ovary to be ovulated and possibly fertilised. The use of exogenous gonadotrophins for the pharmacological stimulation of the ovaries has clearly indicated that oocytes naturally excluded by the selection process can also be matured and, if fertilised in vivo or in vitro, can generate normal offspring.
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