Please enable JavaScript.
Coggle requires JavaScript to display documents.
The Luteal Phase - Coggle Diagram
The Luteal Phase
Luteolysis - destruction of corpus luteum 
-
-
A vascular countercurrent transport system ensures that PGF2 alpha will reach the ovary in sufficient quantities to cause luteolysis in the ewe cow and sow
The requirements for luteolysis (in subprimate mammals) are: presence of oxytocin receptors on endometrial cells, presence of a critical level of oxytocin, PGF 2 alpha synthesis by the endometrium
Luteolysis results in: cessation of progesterone secretion, structural regression to form a corpus albicans, removal of negative feedback by progesterone upon GnRH secretion resulting in a new follicular phase
The luteal phase steps:
The vigor of the corpus luteum probably depends on: the number of luteal cells, the degree to which the CL becomes vascularized
-
-
-
-
synthesis and secretion - growth and development of the corpus luteum accompanied by increasing quantities of progesterone
Progesterone is an inhibitor because it: reduces GnRH pulse frequency, prevents behavioral estrus, stops the preovulatory LH surge, reduces myometrial tone (except in the mare)