Please be the last set: Ob/Gyn Flashcards
adrenarche
6-8 yrs to 13-15 yrs
regeneration of zone reticularis: increased DHEA, DHEAS, androstenedione
gonadarche
begins around 8 years
pulsatile GnRh leads to LH and FSH production
initially just in sleep, eventually leads to estrogen production in ovary
stimulates: thelarche, pubarche, growth spurt, menarche
thelarche
estrogen stimulates; first stage around 10
first sign of puberty
breast development
pubarche
estrogen stimulates; around 11 (lags thelarche by 6 mo)
development of pubic and axillary hair
menarche
12-13 yrs (2.5 years after development of breast buds)
estrogen stimulates
onset of menstruation
for first 2 years: most cycles anovulatory
peak growth velocity
due to increased GH and IGF (stimulated by E)
starts around 9 or 10 and peaks around 12 (9cm/yr)
reached before tanner stage 3 in breast development and stage 2 of pubic hair development
female tanner stages
I: preadolescent; elevation of papillae only
II: sparse, pigmented downy hair along labia; elevation of breast and areolar enlargement
III: darker, courser and curlier hair, further enlargement of breast and areola
IV: hair distribution is adult in type (but not full quantity); projection of areolae and papillae to from secondary mount
V: hair in adult distribution and quantity ; projection of papillae only as areolae recess to beast contour
age considered precocious puberty in
- white girls
- AA girls
- risks
4: Dx
breast or pubic hair development
- 7 years
- 6 years
- female, AA, obese, exposure to sex hormones, McCune Albright syndrome, congenital adrenal hyperplasia
- breast/pubic hair, growth spurt, skeletal maturity greater than age; estradiol greater than 5 pg/mL
causes of gonadotropin dependent precocious puberty
most: IDIOPATHIC
CNS: tumor, lesion, primary hypothyroidism
hamartoma
most frequent type of CNS tumors to cause precocious puberty
contain GnRH neurons (ectopic hypothalamic tissue)
causes of gonadotropin independent precocious puberty
- ovarian cysts or tumors
- exogenous E
- androgen secreting tumor, CAH
- McCune-Albright
McCune Albright syndrome
precocious puberty
cafe-au-alit skin
fibrous dysplasia
present with premature vaginal bleeding (before breast development)
incomplete precocious puberty
variant of normal puberty (early development of sexual characteristics)
check bone age: normal, no further testing
monitor closely
types of incomplete precocious puberty
- premature thelarche
- premature adrenache/pubarche
- isolated growth development; normal growth rate, girls younger than 3 usually
- pubic hair without signs of puberty in children younger that 7-8 years; risk of PCOS
precocious puberty
- Hx
- PE
- age, rate of puberty, growth velocity, CNS path (headache, visual impairment, seizure), sex steroid exposure, family Hx
- growth curve, neurological exam, thyroid, skin, pubic hair breast, genitalia, palpation for pelvic/abdominal mass
precocious puberty: labs
- bone age: skeletal 2 years greater than age
- LH, FSH levels in pubertal ranges
- estradiol greater than 5
- GnRH stimulation
additional testing for precocious puberty
- Gn dependent
- Gn independent
- thyroid testing, brain MRI
2. additional blood tests, pelvic US, bone scan
Tx of precocious puberty
- Gn dependent
- Gn independent
- GnRH antagonist therapy: leuprolide
2. Tx underlying condition
delayed puberty
- absence of sexual maturation by 13 years
- no evidence of monarch by 15-16 years
- when menses have not begun 5 years after thelarche
causes of delayed puberty
- hypogonadotropic hypogonadism
- hypergonadotropic hypergonadism
- Eugonadism
hypogonadism
- pituitary tumor, GnRH insufficiency, hyper-prolactinemia, constitutional delay, chronic disease, CNS disorder, trauma
- ovarian failure, gonadal dysgenesis, iatrogenic (CA, Sx)
- mullerian agenesis, outlet obstruction (imperforate hymen, transvaginal septum), androgen insensitivity
Kallman syndrome
hypogonadotropic hypogonadism, anosmia
delayed puberty
- PE
- labs
- Tx
- tanner staging, vaginal patency, estrogen effect, pelvic masses, signs of Turners
- pelvic USG, FSH, TSH, PRL, karyotype, MRI of brain
- address cause, induce puberty with estrogen, monitor