Reproductive Flashcards
What is the function of the Ovaries?
- Secretion of female sex hormones.
- Development and release of female
gametes, or ova.
Name the 2 phases of the Menstrual cycle
- Follicular Phase
2. Luteal Phase
What happens during the Follicular Phase?
Follicles develop and get ready to release an egg at Ovulation.
What is the time frame of the Follicular phase?
Day 0 (or 1) of Menstural cycle through Day 14.
What happens during the Luteal Phase?
Growth. The body waits to see if an egg is fertilized, and is supporting or not supporting a pregnancy.
What is the time frame of the Luteal Phase?
Day 14-28
Name the structure left behind after ovulation/menstruation.
Corpus Luteum AKA: yellow body
Name the 4 organs involved in menstruation.
Hypothalamus, Anterior Pituitary, Ovary, Uterus (endometrium)
When does the basal body temperature spike during the menstrual cycle?
Just after ovulation.
Where is Lutenizing Hormone (LH) secreted from?
Anterior Pituitary
What is the function of LH?
It’s the “jail break” hormone–it breaks the egg out of it’s capsule
Where is Follicle Stimulating Hormone (FSH) secreted from?
Anterior pituitary
What is the function of FSH?
Causes the Ovary to BUILD a Follicle and get ready to RELEASE an Ovum.
Can you measure GnRH levels in the blood to determine/predict ovulation?
No. W/menstruation, it is not released systemically.
Ovulation occurs within 10-12 hours of the peak of this hormone.
Lutenizing Hormone (LH)
This hormone develops a dominant follicle.
FSH
FSH rises ______ and peaks around ___________.
Rises Early
Peaks around Ovulation
*Follicular phase
During the follicular phase, LH peaks when?
At Ovulation
During the Luteal Phase, what happens to both FSH and LH?
They taper off
Estrogen peaks when in the menstrual cycle?
Just before Ovulation–in the follicular phase
When does Progesterone rise/peak
Just after Ovulation–in the Luteal Phase
Estrogen and Progesterone are released from?
The Ovary
Their release causes negative feedback to the Hypothalamus to stop secreting GnRN, and thus the Anterior Pituitary to stop releasing LH/FSH
What happens if Estrogen and Progesterone don’t shut down the Hypothalamus and Anterior Pituitary?
Over-production of Follicles and Over-stimulation of the Ovary—->No Dominant, Mature Ovum to be Released
If a woman doesn’t Menstruate every month, what is the likely issue (broad sense)?
Communication issue along the HPA axis.