Ovulation
The event that occurs on Day 1 of the Estrous Cycle
What is ovulation?
The hormone that causes a heifer to be receptive to a bull
What is estrogen?
The structure that Estrogen comes from when a female displays receptive behavior
What is the dominant(tertiary) follicle?
The name for the process of the regression of the CL
What is luteolysis?
On day 0 of the estrous cycle, would you expect a female to be receptive to a male
What is yes?
The hormone that is released by the hypothalamus after it is signaled by the dominant follicle
What is GnRH?
The hormone made by the CL (corpus luteum)
What is progesterone?
The hormone producing structure an ovulated follicle becomes
What is a CL (corpus luteum)?
Progesterone does this to the hypothalamus
What is negatively inhibits GnRH?
The average length of the estrous cycle for most livestock
What is ~21 days?
The tissue that GnRH signals to
What is the anterior pituitary gland?
The hormone that "kills" the CL(corpus luteum)
What is Prostaglandin F2a?
Name 2 permanent critical structures for reproduction
What are the hypothalamus, pituitary, & gonads?
This happens to progesterone following luteolysis of the CL
What is decreases?
The phase that occurs on Day 0 of the estrous cycle, often associated with changes in behavior
What is the onset of estrus?
The hormone released from the anterior pituitary at surge levels after being signaled by GnRH
What is LH(Luteinizing hormone)?
The three hormones produced in the brain
What are GnRH, FSH, & LH?
The tissue that signals to the CL that there is no embryo (leading to luteolysis)
What is the uterus(endometrium)?
The negative inhibition of GnRH does what to the release of LH from the pituitary
What is negatively inhibits it?
Which comes first: Ovulation or Estrus?
What is Estrus?
The event that occurs after the surge of LH from the anterior pituitary gland
What is ovulation?
The three hormones produced in the reproductive tract
What are estrogen, progesterone, & PGF2a?
Name 2 transient structures critical for reproduction
What are follicles, CL(corpus luteum), placenta
This structure that can only be present on the ovary following luteolysis of the CL
What is a new dominant follicle?
When GnRH & LH are negatively inhibited, can you have another dominant follicle ovulating at this time?
What is no?