Ovulation disorders Flashcards
What is secondary amenorrhoea?
Cessation of periods for >6 months in someone who has menstruated
What is oligomenorrhoea?
Less than 9 periods/year
What congenital problems can cause primary amenorrhoea?
Turner’s syndrome
Kallman’s syndrome
What intrauterine problem could cause 2o amenorrhoea?
Uterine adhesions
What pituitary problems could cause 2o amenorrhoea?
high PRL, hypopituitarism
How is a PRLoma excluded from history?
Presence of galactorrhoea
What would be signs of oestrogen deficiency?
flushing
low libido
dyspareunia
breast atrophy
What symptom can be a sign of Kallman’s syndrome?
Anosmia
What tests should be ordered with ovulation disorders? (5)
LH FSH oestradiol
TFT prolactin
What is a primary hypogonadism?
Problem with ovaries
What hormone levels are present in 1o hypogonadism?
High LH and FSH
What is a secondary hypogonadism?
Problem with hypothalamus or pituitary
What hormone levels are present in 2o hypogonadism?
Low FSH and LH
What are symptoms of premature ovarian failure?
Amenorrhoea, oestrogen deficiency and elevated gonadotrophins
What causes premature ovarian failure?
Turner’s syndrome
Iatrogenic
Autoimmune e.g. Addisons
What hormone levels are diagnostic of POF?
FSH 430 twice more than 1 month apart
What can cause function 2o amenorrhoea?
Stress weight loss steroids recreational drugs sarcoidosis
What is Kallman’s syndrome?
Genetic loss of GnRH
Why might anosmia be a sign of Kallman’s?
Absence of olfactory bulbs
Describe the release of GnRH from the hypothalamus
Pulsatile release.
Low frequency stimulates FSH
High frequency stimulates LH
Where is FSH secreted from?
Anterior pituitary
What does FSH do? (2)
Stimulates follicular development
thickens endometrium
When LH is at its peak what happens?
Ovulation is stimulated
What does LH do? (2)
Stimulates corpus luteum
Thickens endometrium
When is progesterone peaking?
Day 21
When is LH at its highest?
36 hours before ovulation
What produces progresterone?
Corpus luteum
Where does oestrogen come from? (3)
Follicles in ovaries
Adrenal cortex
Placenta
What does oestrogen do?
Thickens endometrium
Makes cervical mucus fertile
When progesterone is high, what happens to LH?
Suppressed
What does progesterone do?
Makes cervical mucus infertile
Increases basal temperature
What is a group I anovulatory disorder?
Hypothalamic pituitary failure e.g. hypogonadotrophic hypogonadism
In hypogonadotrophic hypogonadism, what are the hormone levels like?
Low FSH and LH
Deficient in oestrogen
What clinical sign is present in hypogonadotrophic hypogonadism?
Amenorrhoea
What can cause hypothalamic pituitary failure?
Stress exercise anorexia head trauma steroids and opiates Pituitary tumours
How can hypogonadotrophic hypogonadism be treated?
Pulsatile GnRH SC/IV
What is a group II anovulatory disorder?
PCOS
ovaries do not respond to hormones from pituitary
What are hormone activities like in PCOS?
LH high
oestrogen normal
What criteria must be filled to diagnose PCOS?
Rotterdam. 2 of
polycystic ovaries on USS
Oligo/Amenorrhoea
Clinical/biochem signs of acne or hirsuitsm
How may polycystic ovaries appear on USS?
12 or more of 2-9mm follicles
May be uni or bilateral
Increased ovarian volume
Why is DM2 more common in PCOS?
Insulin resistance common
Insulin lowers SBGH so more free testosterone
What is the increased risk with amenorrhoea?
Endometrial hyperplasia may cause endometrial Ca
What folic acid are given if BMI >30?
5mg
What oral therapy is given for ovulation induction in PCOS?
Clomifene citrate
What are common side effects of clomifene citrate?
Visual disturbances & OHSS (withdraw both)
hot flushes
abdo pain
n&v
What other options are there for PCOS treatment?
Metformin
FSH injections
What are the benefits of metformin in PCOS?
Improves insulin resistance
Reduction in testosterone- hirsuitsm
Restoration of menstruation
No wt gain
What is the risk of ovarian hyperstimulation?
DVT risk
Ascites
ARDS
How might mild OHSS be recognised?
Abdominal bloating and pain
On USS, follicles less 8cm
What are the risks of multiple pregnancy?
Anaemia Low birth weight/premature Pre-eclampsia GDM Caesarean more likely TTTS
What does chorionicity mean?
Sharing of the same placenta
What is the most dangerous chorionicity to have?
Monoamnionic monochorionic
What is a lambda sign?
Dichorionic twins
What is the sign in monochorionic twins?
T sign
What is Twin-Twin Transfusion syndrome?
Two linked vascular supplies where one twin has the main one and drains from the other
True or False
Twin pregnancies are more likely to have a child with a disability
True
Cerebral palsy
Congenital HD
What major complication is clomifene citrate associated with?
Ovarian cancer
What class of drug is given in hyperprolactinaemia?
Dopamine agonists
Name a dopamine agonist
Cabergoline
True or False
Cabergoline is safe in pregnancy
False
What is a group III classification?
Ovarian failure
What can cause premature ovarian failure?
Turner syndrom
Chemotherapy
Autoimmune ovarian failure
What treatment is available for premature ovarian failure?
HRT
Assisted conception
Cryotherapy where POF anticipated
What is a progesterone challenge test for?
Menstrual bleed in response to 5 day course of progesterone to check normal oestrogen levels
What is secondary infertility?
Previous ability to concieve (not necessarily to term) and now no ability
What issues give a poor prognosis?
Male infertility
Endometriosis
Tubal factor infertility
When is the prime time for conception?
2 days before ovulation
What is Sheehan’s syndrome?
Excessive blood loss during labour leading to low BP and postpartum hypopituitarism
What is the hormone activity in anorexia nervosa?
Low FSH, LH and oestradiol
What are the clinical features of premature ovarian failure?
Hot flushes
Night sweats
Atrophic vaginitis
What causes atrophic vaginitis?
Low oestradiol
What are infective causes of tubal disease?
STI
Transperitoneal spread e.g. appendicitis
IUCD insertion
What are non-infective causes of tubal disease?
Endometriosis
Fibroids
Polyps
Salpingitis isthmica nodosa
What is Salpingitis isthmica nodosa?
Nodular thickening of the Fallopian tube due to inflammation
What is a hydrosalpinx ?
Blocked fallopian tube filled with fluid
What are symptoms of a hydrosalpinx ?
Abdo pain
Dyspareunia
Febrile
Dysmenorrhoea
What is endometriosis?
Endometrial glands outside the uterine cavity
What are the clinical features of endometriosis?
Dysmenorrhoea
Dyspareunia
Painful defecation
What may show on a scan with endometriosis?
Chocolate cysts on ovary
Fixed and retroverted uterus
What is the most common cause of male infertility?
Varicoele
What is cryptorchidism?
Missing testes
What is a variocele?
Abnormalities in the veins in the testes which distracts blood supply.
What is a normal testicular volume?
> 8cm
If periods are irregular, when will progresterone be highest?
7 days prior to expected period
What is a hysterosalpingiogram?
X-ray of uterus and fallopian tubes
If PID is suspected which imaging would be done?
Laparoscopy
When would a chromosome analysis need to be done?
If primary amenorrhoea or azoospermic
What can a chlamydia infection lead to which may affect fertility/
Tubal block in men and women
How can rubella affect a neonate?
Microcephaly PDA Cataracts Bulging fontanelle Rash
How is rubella prevented?
MMR vaccine.
What cautions are needed with the MMR vaccine?
Contraception required for 1 month before concieving
How is chlamydia treated?
Azithromycin
What are the symptoms of chlamydia?
Dysuria
Abdo pain
Abnormal discharge
Haematuria
How is clomifene citrate taken?
Day 2 - day 6
Why is progesterone checked in clomifene citrate use?
To check dosage is high enough to stimulate ovulation
What is letrozole an example of?
Aromatase inhibitors
How do aromatase inhibitors work?
Prevents aromatase converting androgens from FSH to oestradiol so increases [FSH]
True or False
There is no difference in FSH sensitivity in PCOS
False.
PCOS sufferers have a higher FSH threshold
True or False
PCOS has a higher sensitivity to exogenous gonadotrophins
True
When a sperm count is needed how is this carried out?
At home.
Keep in trousers.
To lab in
How many sperm need to be normal in 100 for the sample to be normal?
4
When can IU insemination be undertaken?
Sperm normal but blockage of vas deferens
Where is sperm recovered from surgically?
Epididymis
How many cells does a blastocyst have?
125