the menstrual cycle Flashcards
the menstrual cycle
Follicular phase
Hypothalamus-> gonadotropin-releasing hormone (GnRH).
Pituitary gland -> follicular stimulation hormone (FSH).
FSH stimulates follicles in the ovaries to grow and mature eggs.
Growing Follicle -> estrogen (E2)
High estrogen->pituitary -> luteinizing hormone (LH) and FSH.
About 24 hours after the LH surge(peak)-> ovulation
Post ovulation-> corpus luteum (the empty follicle) produces progesterone/estradiol
Luteal phase begins
Estradiol (E2) - day 1-4 - what levels are normal?
(ester is pg)
<80 pg/ml
Estradiol (E2) - day 5-14
100+ pg/ml
(Rises in relation to growing follicles )
Follicle Stimulating Hormone (FSH) - day 1-4
(I and U are follicles)
<10 IU/ml
LH - day 1-4
<10 IU/ml
LH - day 5-14
> 15 (surge) mIU/ml
Depends on lab assay, etc..could be as low as >12 (most will be well about ~ >20 or higher
progesterone (P4) - day 1-14
<1.5 ng/ml
progesterone (P4) - after ovulation
(progy is 1 1/2 to 2 1/2)
> 2.5 ng/ml
abnormal results E2 - day 1-4
> 100 pg/ml, causes - Functional Ovarian cyst, Perimenopause
abnormal results E2 - day 1-4 - implications - think about what E2 does
Delayed treatment start
Suppresses FSH level
FSH - abnormal results - day 1-4
> 15 IU/ml - causes - Perimenopause
Checked on day of LH surge
FSH - abnormal results E2 - day 1-4 - implications
Decreased egg quality
FSH invalid due to the normal surge on day of LH surge
LH - abnormal results - greater than 15 - day 1-4, preovulatory
(lutenize my PCOS)
> 15 mIU/ml, causes - PCOS
LH - abnormal results - 1-4, preovulatory
May advise false reading on OPK
P4 - Luteal phase - abonormal results - less than 2.5 - and causes? (tested 7 days after ovulation)
(Progy is small)
<2.5 ng/ml - cause -Anovulation
P4 - Luteal phase (tested 7 days after ovulation) low progesterone - treatment?
May need ovulation induction medication
AMH
(Anti-Mullerian Hormone
What is AMH?
AMH (Anti-mullerian hormone) is protein released by small follicles in the ovaries. These “resting” or antral follicles contain immature eggs that can be stimulated to produce mature eggs that can be frozen or fertilized.
This bloodtest along with the AFC Ultrasound can help with ovarian reserve assessment.
It also, helps the provider determine medication dosing for someone going through IVF/Egg Freezing; and help to give expectations on number of eggs one might anticipate at a future egg retrieval.
AMH - high - the number
> 4.0
AMH - normal
(AMH was a 1.5 earthquake)
1.5-4.0
AMH - low normal
1.0-1.5
AMH - low
0.5-1.0
AMH - very low
<0.5