gynae Flashcards
Ladies presenting from which countries should you consider FGM?
Somalia, Sudan, Kenya, Eritrea, Ethiopia and the Yemen, Malia, Guinea and Egypt
How is FGM classified?
Type 1 - clitoroidectomy - partial or total removal of clitoris and/or prepuce
Type 2 - partial/total removal of clitoris and labia minor ± excision of labia majora.
Type 3 - infibulation - narrowing of vaginal orifice by creation of a seal through cutting and appositioning of labia minora/majora, ± clitoroidectomy.
Type 4 - any other harmful procedures to female genitalia for non-medical reasons e.g. pricking, piercing, cauterisation, incision and scraping
Acute complications of FGM
haemorrhage, pain, urinary retention, sepsis, HIV, tetanus, death
Long-term sequelae of FGM
Chronic pain, apareunia, dyspareunia, anorgasmia, sexual dysfunction, keloid scar, UTIs, micturition difficulty, sub fertility, psychological/emotional trauma.
Describe the sequence of events in female puberty
Breast bud development -> pubic hair -> axillary hair -> menarche
Briefly describe the hormonal changes through the ovarian cycle
Follicles start developing independently, low steroid/inhibin = little negative feedback on HPG axis -> increasing FSH and LH -> follicle growth + oestrogen production.
Rising oestrogen -> -ve feedback HPG axis -> reduced FSH -> one follicle survives, others polar bodies.
Oestrogen increases sufficient to cause +ve feedback HPG -> LH surge (FSH suppressed by Inhibin) -> ovulation.
Luteineised follicle secretes oestrogen + progesterone, restoring -ve feedback HPG. End of cycle = corpus luteum regresses to reset the cycle (no fertilisation) or is maintained by the syncytiotrophoblast of the embryo which secretes hCG, it is supported by placental hCG which controls HPG axis around 4months.
With respect to the uterine cycle, length of cycle varies due to variation in….?
Follicular phase, luteal phase remains constant hence you measure LH 14 days before end of cycle to catch ovulation.
A 23 year old woman attends her GP, she is soon to go on a beach holiday and has heard of a pill that can delay her menstruation to avoid it coinciding with the holiday. What treatment options are there for delaying menstruation?
take norethisterone 5mg TDS 3 days before expected period. If overweight/smoker/35+/risk of VTE use medroxyprogesterone acetate.
What is oligomenorrhoea and at what age is it more likely?
Infrequent periods - cycles lasting over 35 days and/or fewer than 9 periods per year, extremes of reproductive age
How is amenorrhoea classified?
Primary - failure to commence menses
Secondary - cessation of periods for >6 months after menarche in the absence of pregnancy.
How would you investigate oligomenorrhoea/amenorrhoea?
Pregnancy test!
FSH - raised if POF, low/normal in hypothalamic-pituitary cause
LH - raised in POF/PCOS; low/normal in hypothalamic-pituitary cause
oestradiol - low in hypothalamic and POF
testosterone - raised in PCOS
prolactin - raised in prolactinoma, stress, hypothyroid
TFT if clinically suggestive?
Common causes of oligomenorrhoea
PCOS, hormonal/contraceptive treatments, perimenopause, thyroid dysfunction, diabetes, ED, excessive exercise, medications (anti-psychotics/AEDs)
Common causes of amenorrhoea
Hypothalamic (low GnRH, low FSH/LH) - ED, exercise, severe chronic disease (thyroid, psychiatric disorder, sarcoidosis), Kalllman syndrome.
Pituitary - prolonged use of contraception (esp Depo-Provera can take 18m as pituitary downregulated), prolactinoma, other pituitary tumour (acromegaly, Cushings), Sheehans syndrome.
Ovarian - PCOS (though more commonly oligomenorrhoea), Turners Synd, POF
Consider - adrenal (CAH), genital tract abnormality (Ashermans syndrome, imperforate hymen, septum)
How is premature ovarian failure managed?
Cyclic HRT - oestrogen (+ progesterone if she has a uterus)
DEXA scan - vitamin D and calcium
Define premature ovarian failure
Onset of menopausal symptoms and elevated gonadotrophins (LH and FSH) before the age of 40. Usually idiopathic but can occur secondary to chemo, radiation, autoimmune.
Define polycystic ovary syndrome
Endocrine disorder affecting 5-10% pre-menopausal women, characterised by oligo/a-menorrhoea, excess androgen production and presence of multiple immature follicles ‘cysts’ within the ovary as seen on imaging.
What is the underlying aetiology in PCOS?
increased frequency of GnRH pulse -> increased LH levels which promotes androgen production and insulin resistance which suppresses hepatic SHBG production causing increased free androgens.
Increased androgens prevent LH surge sufficient to cause ovulation so follicles within the ovary remain arrested early in development hence seen as ‘cysts’ on imaging.
Clinical features of PCOS
Oligo/a-menorrhoea, obesity, subfertility, acne, hirsutism, chronic pelvic pain, depression, acanthosis nigricans, male-pattern hair loss, hypertension
A 23 year old female visits her GP complaining of infrequent periods - her cycle usually lasts 37-39 days and in the last year she has had 8 periods. You also note she is rather hirsute and her BMI at last checking was 31.
What is your differential ddx?
PCOS - oligomenorrhoea, hirsute, obese
hypothyroidism - obesity, insulin resistance, oligomenorrhoea
Cushings - obesity, acne, htn, insulin resistance
hyperprolactinaemia - oligo/amenorrhoea, acne, hirsute.
How is PCOS diagnosed?
By fulfilling 2 out of 3 of the Rotterdam criteria:
oligo/a-menorrhoea
clinical/biochemical sx hyperandrogenism
polycystic ovaries seen on US (>12follicles in one ovary, or ovary vol >10cm3).
What investigations would you perform in someone with clinical picture suggestive of PCOS and when?
Bloods - (FSH and LH best taken day 1-3):
- FSH - normal/low
- LH - raised (classically LH:FSH 3:1)
- Progesterone - low (corrected for time in cycle)
- Testosterone - high
- SHBG - low
may be worth testing for diabetes simultaneously
(if ?diagnosis - TSH, prolactin)
US ovary - 12+ cysts in one/ovarian vol >10cm3
What are the general themes of managing PCOS?
Rx underlying diabetes/htn. If overweight advise diet and exercise to lose weight will help all facets of mx! oligo/a-menorrhoea infertility obesity hirsutism
A 35 year old female attends GP clinic as following subfertility investigations she was found to have PCOS. How would you counsel her on improving fertility with PCOS?
If overweight lifestyle changes - achieving BMI <30 can be enough to trigger ovulation on its own.
Drug rx - Clomifene citrate and/or metformin
- clomifene stimulates ovulation, can only be given for 6months due to risk of ovarian hyper stimulation/ca, also risk of multiple pregnancy
- not responding = ?ovarian drilling
A 17 year old girl is newly diagnosed with PCOS and attends your clinic to discuss management. The main symptom of her PCOS is oligomenorrhoea. However, she says she is quite happy to have periods less frequently anyway so does not see the need for treatment. What would you advise?
She is unlikely to be ovulating in her current state, anovulation means progesterone production is suppressed, leaving oestrogen unopposed. Unopposed oestrogen promotes endometrial hyperplasia, which increases risk of endometrial cancer. For that reason it is advisable to have 3+ periods per year. So would advise use of COCP, levonorgestrel-IUS, cyclical progesterone such as medroxyprogesterone. OCs also have the benefit of treating hirsutism and acne.