Menarche, Pubarche, Thelarche Flashcards
Avg age of menarche
12.4 yrs
Which hormones rise at 20 wks gestation?
FSH/LH and glucocorticoids
What is gonadostat?
The hypothalamic-pituitary system regulating gonadotropin release
How are low levels of gonadotropins and sex steroids maintained in prepuberty? (2)
- Gonadostat is sensitive to negative feedback of low estradiol.
- Intrinsic CNS inhibition of GnRH secretion.
What steroids increase from ages 8-11? (3)
DHEA
DHEA-s
Androstenedione
When does onset of puberty occur?
Approx 11 y/o
What is the feedback of estradiol on LH during mid to late puberty?
The positive feedback of estradiol on LH creating ovulation is complete and ovulatory cycles are established
Summary of puberty
HPA is suppressed from 4-10 (2 ways)
From 8-11 androgens increase
Age 11-12 GnRH increases and ovarian follicular development occurs.
In what order are somatic changes?
Thelarche (breast development)
Adrenarche/Pubarche (pubic hair and androgen development)
Increased growth
Menarch
TAPup-ME
Tanner staging of breasts
1 -flat 2 - breast bud 3 - enlargement of bud w/o contour 4 - projection of areola 5 - recession of areola and contour established
Menses occurs how long after puberty?
How long after thelarche?
1 yr
2-3 yrs
Primary amenorrhea
Absence of menarche by 13 y/o w/o secondary sex development OR by 15 w/ secondary sex development.
Secondary amenorrhea
No period for 6 mo
Polymenorrhea
Frequent periods at <21 days
Menorrhagia
Excessive/prolonged BUT regular periods