Lecture 9 - PCOS & Adrenal Disorders Flashcards
PCOS
Polycystic Ovary Syndrome
diagnosed by presence of 2 of 3 following criteria…
Hyperandrogenism
ovulatory dysfunction
polycystic ovaries
PCOS Pathophysiology
Never get to Corpus Luteum stage and make the primary follicle
Abnormal LH/FSH production in anterior pituitary. Pts with PCOS have 2-3 times normal ratio LH/FSH (Making more LH)
LH prevents primary follicle
Can have infertility
LH causes a lot of excess androgen production
convert cholesterol to testosterone more efficiently = more test
have some insulin resistance, and hyperinsulinemia = more test
Menstral irregularities
Oligomenorrhea = < 8 periods per year or menstruation cycle with duration > 35 days
Amenorrhea = no menstration for > 3 months w/o pregnancy
PCOS Clinical presentation, any of the 2 to be diagnosed
Central irregularities
Hyperandrogenism
Polycystic ovaries
Insulin resistance
Obesity
Polycystic ovaries defintion
> 20 follicles measuring 2-9mm or an inc in ovarian volume of 10ml in either ovary with no evidence of dominant folicclesa or corpora lutea
PCOS complications
Reproductive consequences
Endometrial cancer
Metabolic consequences
CVD risk
Obstructive sleep apnea
Depression
PCOS Risk factors
Menarche at early age
Weight
Family history of PCOS
Clomiphene MOA:
Selective estrogen receptor modulator
Clomiphene Clinical benefit
Management of infertility
higher risk of multiple births compared to letrozole
rec adding metformin in pts > 28yrs old who have clomiphene resistance and visceral obesity
Clomiphene Dosing
50mg PO 5 days, start 5th day of cycle
can titrate up to 100-150mg in subsequent cycles
dont do more than 6 cycles
Clomiphene CI
Preg or breastfeeding
preg test before each cycle
Clomiphene ADE
Vasomotor symptoms
Flushing
headache
vision changes
Letrozole MOA
Aromatase inhibitor, reduces estrogen production
Letrozole Clinical Benefit
Management of infertility
1st line option
Alternative for clomiphene failures
Letrozole dosing
2.5-7.5mg PO QD on cycle days 3-7
can take up to 5 cycles
Letrozole ADE
Edema
hot flashes
Headache
Fatigue
nausea
dizziness
bone pain
Letrozole CI
Preg
Letrozole DI
CYP3A4 and CYP2A6 substrate
Gonadotropins info
second line therapy for those who failed other treatments
MOA: ovulation induction
Metformin for infertility
2nd line
can add to clomiphene for resistance
can be used as adjunctive therapy during IVF
Dosing: 500mg TID
helps with weight loss, improvement in menstrual cycle, hyperandrogegism symptoms, and insulin resistance
PCOS treatment Algorithm
Obese = start Lifestyle mod 3-6 months then meds
Non obese = meds
if still no preg add metformin
if ovulation returns, try for 6 months
if ovulation not return, see expert
Contraception info PCOS
use very low doses of estrogen (NMT 35mcg ethinyl estradiol)
preference for middle to low androgen or anti androgen progestin
can do intermittent or continuous progestin only
PCOS Oligomenorrhea Treatment Algo
Obese = lifestyle mod for 3-6 months, then continue previous pathway if they want baby
Non obese = if want baby then do previous pathway, if no baby then contraception
Preferred Hyperandrogenism treatment
Spironolactone
Dose: 50-100mg BID
ADE: Hyperkalemia, HA, fatigue
Pt ed : use contraception to prevent feminization of male fetuses; months to see benefit maybe
DI: ACE/ARBs