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Oestrous Cycle - Anatomy & Physiology (view source)
Revision as of 13:49, 10 September 2008
, 13:49, 10 September 2008→Crpus Luteum of the Oestrous Cycle
* The surface from which ovulation has occurred is wrinkled and may be blood-stained.
* The surface from which ovulation has occurred is wrinkled and may be blood-stained.
==== Crpus Luteum of the Oestrous Cycle ====
==== Corpus Luteum of the Oestrous Cycle ====
* The corpus luteum develops by hypertrophy and luteinization of the follicular granulosa cells, this occurs rapidly.
* By 48 hours after ovulation, the corpus luteum is ~1.4cm in diameter. It feels soft and yields on palpation.
* It is dull cream in colour and the luteinized cells can be seen in loose pleats.
* It attains its maximum size by day 7-8 of dioestrus.
* Luteinized pleats are now compact.
* The body is a homogenous mass that is yellow/orange in colour.
* The shape varies, most are oval but they can be square or rectangular.
* Sometimes the centre is occupied by a cavity which is occupied by yellow fluid. This is known as a cyctic corpus luteum, but is rarely pathogenic and usually completely normal.
* If a cavity is present, it must be distinguished from a luteinisation of the walls of the follicle without ovulation (abnormal).
** If it is a corpus luteum with a cavity, there will be a pin-head depression in the centre of the projection from the surface of the ovary. This depression indicates ovulation has occured.
==== Projection of the Corpus Luteum from the Surface of the Ovary====
==== Projection of the Corpus Luteum from the Surface of the Ovary====