Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
Folliculogenesis, Ovulation and Endocrine Influence of the Oocytes and the Embryos in the Dog
K. Reynaud
Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
Read
Reproductive physiology in dogs is quite peculiar compared to that in other mammalian species. Among its peculiarities, one might mention the presence of numerous polyoocyte follicles, the ovulation of a immature oocytes (at the GV stage, non fertilizable), and a peri-ovulatory period during which the level of circulating progesterone is particularly high. The canine ovary develops during the early fetal life and the first primordial follicles generated by oogonia nests are observed approximately 2-3 weeks after birth. Some of these oogonial groups remain bound together and generate multioocytic follicles. Such follicles are rare in women or mice (less than 3 %) but are indeed quite frequent in the bitch to the extent that they may represent as much as 14% of the follicle population (with up to 17 oocytes per follicle (1)). Several studies suggest that multi-oocytic follicles may reach the preovulatory stage and may even ovulate. However, the quality of the oocytes within a given follicle seems to be heterogeneous. It would appear that, among them, a single oocyte is of good quality and functionally active. The presence of several oocytes within a single follicle leads to speculations on the potential exchanges between oocytes and on the mechanism of selection of a single functional oocyte that may eventually ovulate, in which meiosis may resume and which eventually can be fertilized. [...]
Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
About
Affiliation of the authors at the time of publication
UMR 1198 INRA-ENVA Biologie du Développement et Reproduction, Alfort Veterinary School, F-94700 Maisons-Alfort, France
Comments (0)
Ask the author
0 comments