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Oestrous Cycle - Anatomy & Physiology (view source)
Revision as of 14:04, 11 September 2008
, 14:04, 11 September 2008→Dioestrus
==== Dioestrus ====
==== Dioestrus ====
* At first, the corpus luteum contains a central cavity.
* By day 10 after ovulation, the cavity becomes filled by compact luteinised cells.
* At this time, the corpus luteum reaches its full size, measuring 0.6-1.0 cm.
* Corpora lutea comprise the greater mass of the ovary.
* Generally, equal amounts of corpora lutea are found on each ovary.
** The number of foetuses in the uterine horns frequently differ from the number of corpora lutea on the ovaries of their respective sides.
** Embryonic migration to the uterine horn of the opposite side is common.
* On section:
** Corpus luteum is yellow-pink
** It remains unchanged in the non-pregnant bitch until about day 30 after ovulation.
** It then slowly atrophies
** During pregnancy, corpora lutea persist at their maximum size thoughout the pregnancy, but regress rapidly after parturition.
==== Appearance of the Ovaries on Ultrasound ====
==== Appearance of the Ovaries on Ultrasound ====