Gynae Flashcards
(125 cards)
A surge in which hormone initiates ovulation? How long after this surge does ovulation take place?
LH
36 hours
What does FSH do?
stimulates development of ovarian follicles and subsequent secretion of oestrogen
what does LH do?
Production of oestrogen
Conversion of graafian follicles into progesterone producing corpus luteum (prog causes endometrium to become more receptive to implantation)
Surge leads to ovulation
High oestrogen and progesterone causes what effect on GnRH and FSH?
Negative feedback so inhibits HPO axis
Role of oestrogen?
Endometrial thickening and thinning of cervical mucus (to allow for easier sperm passage)
two phases of menstrual cycle?
Follicular and luteal phase
Duration of follicular phase?
variable
Duration of luteal phase?
Ovulation occurs on day 14. Corpus luteum lives for 14 days.
What hormone does the corpus luteum secrete? what does it do?
progesterone.
- Stabilises endometrium
(if fert takes place then prog production cont and endometrium stays stabilised)
(if no fert, then CL dies and prog levels drop, result in unstable endometrium and shedding)
Classification of menorrhagia
Primary - idiopathic (dysfunctional uterine bleeding) = majority Secondary - Adenomyosis - Uterine fibroids - Coagulation disorder/anticoag rx - Hypothyroidism - Polyps/hyperplasia - IUD (copper coil)
23 yo female presents with concerns regarding her heavy bleeding? Briefly list the questions you’ll ask
Cycle
- PMP
- regular - duration?
- no. of days bleeding
- no. of days heavy bleeding
- clots/flooding
- no. tampons/sanitary towels (how often change)
Assoc sx
- dysmenorrhoea
- vaginal discharge
- IMB/PCB
- Dyspareunia
- pelvic pain
Medications
PMhx
Impact on QOL
Examination for menorrhagia
- signs of anaemia or hypothyroidism
- abdo exam
- speculum (smear if due)
- Bimanual pelvic examination
Investigations for menorrhagia
Bloods (FBC-anaemia, TFTs, clotting)
If NAD on exam then further investigations not necessary
- TV USS (endometrial thickening, adnexal masses)
- Hysteroscopy (1st line if PMB)
Management of menorrhagia?
- Mefanamic acid (NSAID)
- Tranexamic acid (anti-fibrinolytic)
- COCP
- Mirena (IUS) - large number of women will be amenorrhoeic at 1 yr after insertion
- Endometrial ablation (destroys basal layer via diathermy, laser, transcervical endomet resection)
- Hysterectomy
Causes of amenorrhoea?
Primary (lack of menstruation by the age of 16) - outflow obstruction - ovarian disorders - pit disorders - hypothalamic disorders Secondary (absence of menstruation for 6 months) - cerebral - hypothalamic-pit - thyroid (hyper/hypo) - adrenal - ovary - uterine/vaginal
List some causes of cerebral secondary amenorrhoea?
starvation excessive exercise anorexia stress anti-dopaminergic drugs neoplasm
What pituitary problem can cause secondary or primary amenorrhoea?
prolactinoma - secretes prolactin therefore neg feedback to hypo to reduce GnRH which reduces FSH, LH –> anovulation and amenorrhoea
Adrenal causes of amenorrhoea?
- cushing’s syndrome
- androgen secreting tumour
Ovarian causes of amenorrhoea?
- PCOS
- menopause
- chemo/rad
- resistant ovary syndrome
Uterine/vaginal causes of amenorrhoea?
- pregnancy
- cervical stenosis
- Mirena IUS
- ascherman’s syndrome
Primary outflow causes of amenorrhoea?
- mullerian agenesis
- androgen insesitivity
- imperforate hymen
Ovarian disorders causing primary amenorrhoea?
PCOS Gonadal dysgenesis (turners syn)
Brief hx for amenorrhoea?
- preggo?
- contraception
- galactorrhoea
- androgenic sx (hirsutism, acne, wt gain)
- wt loss
- daily issues (exercise, eating, stress)
- sweats and flushes (menopause)
Pmhx
- chemorad, surgery gynae
Dx
- APs, heroin, methadone, metoclopramide
- Contraceptives (injectable progestogens)
Fhx
- hx of premature menopause or late menarche)
18yo female presents with lower abdo pain with a crampy feeling that occurs on the first day of her period? What term would you use to describe this presentation? What are the causes?
Dysmenorrhoea = painful menstruation - Primary = no obvious organic cause - Secondary = underlying condition. >teen year. change in usual pain. \+ Endometriosis \+ PID \+ IUS \+ sub mucous fibroids \+ asherman's syndrome \+ psychosexual problems \+ cervical stenosis