Obs & Gynae 3 Flashcards
Give 4 principles of care to consider when investigating + managing infertility.
- See both partners together
- Explanation + written advice
- Psychological effects of fertility problems
- relationship difficulties
- support groups
- counselling - Seen by specialist team
What initial advice should be given to couples trying to conceive?
- Inform effect of age
- Preconception advice: folic acid, smoking cessation
- Refer after 1 year -> early referral if female over 35yrs, or if there is a known / suspected problem.
List some reproductive disorders associated with obesity.
- PCOS
- Infertility
- Miscarriage
- Obstetric complications
What investigations might you request when investigating a couple for infertility?
- Ovulation / ovarian function
- Semen quality
- Tubal potency (+ uterus_
Which 3 hormones are measured in ‘Ovarian Reserve Testing’?
- FSH
- AFC (Antral Follicle Count)
- Antimullerian Hormone (AMH)
What is the diagnostic criteria for PCOS?
Rotterdam Criteria: 2 out of 3
- Anovulation / oligo/amenorrhoea
- PCOS on scan (TVS)
- Raised androgens: clinical or biochemical -> exclude adrenal cause
What treatment measures may be used for PCOS?
- Normalise weight
- Clomifene (or Tamoxifen)
(but may increase risk of ovarian cancer if used for more than 12 months) - Metformin
> less effective than clomifene alone
> less effective in obese
> may help if clomifene resistant
> GI side effects
Tubal disease may be a cause of infertility. What are the causes of tubal disease?
- Infections: Chlamydia, Gonorrhoea
- Endometriosis
- Surgical: adhesions, sterilisation
Does medical treatment of endometriosis improve the chances of pregnancy?
Medical treatment of minimal or mild endometriosis does not improve chances of pregnancy.
What are the risks of IVF?
- Multiple pregnancy
- Miscarriage
- Ectopic
- ? Fetal abnormality
- Ovarian hyperstimulation syndrome
- Egg collection = risky
- Longer term: ? Ovarian Ca.
List some patient factors affecting the success of IVF.
- Age
- Cause of infertility
- Previous pregnancies
- Duration of infertility
- Number of previous attempts
- Specific medical conditions
- Environmental factors
Increased maternal age confers increased risk on the pregnancy. Give examples of why the pregnancy is higher risk.
Increased risks of:
- Hypertension
- Diabetes
- IUGR
- Operative Delivery
- Thromboembolism
- Maternal death
What is the role of uterine abnormalities in pregnancy?
- Associations with infertility / miscarriage
- Exact role is not clear
- Abnormalities:
> adhesions
> polyps
> fibroids
> septate uterus
With regards to IVF, the chance of pregnancy decreases with 4 factors. Name these 4 factors.
- Maternal age
- Successive cycles
- Obesity
- Environmental factors (smoking, alcohol, caffeine)
At what age does breast cancer screening take place?
Females, aged 50 - 70 years
How often are women above 50yrs invited for breast screening?
3 yearly
What assessment is carried out in the fast track breast cancer clinics?
Triple Assessment:
- Physical Examination
- Mammogram (USS)
- Biopsy
What scoring system is used for each of the investigations for breast cancer, and what should you look for in the scores?
P = Physical Exam (1-5)
M = Mammogram (1-5)
B = Biopsy (1-5)
* Look for concordance in the results.
Which nodes should you check when conducting a physical examination for breast cancer?
- Axillary
- Supra-clavicular
- Sub-clavicular
List some pre-existing medical disorders in pregnancy.
- Asthma
- Epilepsy
- Hypertension
- Diabetes
- Thyroid disease
List some pregnancy-specific medical disorders seen in pregnancy.
- Pre-eclampsia / Eclampsia
- Thromboembolism
- Gestational Diabetes Mellitus (GDM)
- Obstetric Cholestasis
- Acute Fatty Liver Disease
What are the key issues regarding management of medical disorders in pregnancy?
- Be familiar with normal physiological changes of pregnancy
- Preconception assessment
- What is the effect of pregnancy on the Medical condition?
- What is the effect of the medical condition on the pregnant woman and her baby? (incl. impact of maternal medication).
Describe some steps which might be taken prior to conception to maximise the chance of a healthy pregnancy in a woman who has a disease.
- Optimise disease control
- Rationalise drug therapy to minimise effects on baby -> alter medication to drugs ‘safe’ in pregnancy
- Advise on risks to mum + baby
- Agree a plan of care -> MDT
- Effective contraception until ready to conceive.
What effect might pregnancy have on a pre-existing condition?
- May cause condition to worsen eg. mitral stenosis
- Some conditions improve in pregnancy eg. Rheumatoid Arthritis.
What effect might a pre-existing medical condition have on the health of baby + mum?
- Increased risk of pregnancy complications eg. HTN -> pre-eclampsia
- May have detrimental effects on the baby either:
i) directly: eg. teratogenic drug effects
ii) indirectly: eg. premature delivery
What considerations should be made for the delivery of a pregnancy where mum has a pre-existing conditions?
- ‘Safest’ mode of delivery
- Neonatal support
- Anaesthetic expertise
- HDU / ITU facilities
- Ongoing care postpartum -> maternal condition may initially deteriorate.
i. Which type of anaemia is most common in pregnancy? ii. Why?
iii. What are the implications of this anaemia for the baby?
i. Iron deficiency anaemia, followed by folate deficiency anaemia
ii. Pregnancy is associated with a 2-3 fold increase in requirement for iron and a 10-20 fold increase in folate requirements
iii. Iron deficiency is associated with low birthweight and preterm delivery.
Describe the physiological respiratory changes seen in pregnancy.
- Increased metabolic rate + increased oxygen consumption
- Increased minute ventilation due to increase in tidal volume
- Arterial pO2 increases; pCO2 decreases
- Mild compensated respiratory alkalosis is normal in pregnancy.
Pregnancy may exacerbate asthma. With regards to trimesters, when is this most likely to occur?
Risk of asthma exacerbation is most likely in the 3rd trimester
What are the effects of asthma on the foetus during pregnancy?
- Risk of fetal growth restriction due to inadequate placental perfusion
- Premature delivery: usually due to deterioration in maternal condition
Which drugs can be used for Asthma in pregnancy?
- Short acting b2 agonist
- Long acting b2 agonist
- Inhaled steroids
- Theophyllines
- Steroid tablets (in severe asthma)
- Leukotriene antagonist can be used
What are the physiological changes experienced by the cardiac system during pregnancy?
Cardiac output rises by 40% (mainly due to increased stroke volume)
CO = SV x HR
What considerations should you have when managing cardiac disease in a pregnant woman?
- Prediction + prevention of heart failure
- Anticoagulation -> if mechanical heart valves
- Drug therapy: may need to alter / add medication
- Monitor fetal growth and well being -> scan
- Timing and mode of delivery
- Postpartum complications -> cardiac failure
How does Obstetric Cholestasis present?
- Usually in 3rd trimester
- itchy palms of hands + soles of feet
- NO RASH *
- Abnormal LFTs:
Raised AST, ALT + Bile acid
If a woman presents with obstetric cholestasis, what are the risks to the baby? What does this risk relate to?
Risk: stillbirth, premature labour
Relates to: the level of bile acid (higher bile acid = increased risk)
What is the treatment for Obstetric Cholestasis?
What is the effect of this treatment?
- Ursodeoxycolic acid
- Appears to be associated with improved biochemical abnormalities (bile acid level + LFTs)
- treatment has not been shown to reduce fetal complications.
When does Obstetric Cholestasis tend to resolve?
After delivery.
Hyperthyroidism is uncommon during pregnancy and usually improves after the 1st trimester.
What are the - i) maternal; and ii) fetal / neonatal - risks (during pregnancy) of hyperthyroidism?
Maternal: Thyroid crisis with cardiac failure
Fetal / Neonatal: Thyrotoxicosis due to transfer of thyroid stimulating antibodies
Give an example of an anti-thyroid drugs. What complication may this drug cause?
Propylthiouracil: May cause maternal liver failure
Carbimazole: Causes fetal abnormalities
If a pregnant woman is hypothyroid + this is not treated, what is she at risk of?
- Early fetal loss
- Impaired neurodevelopment of baby
What treatment should a hypothyroid woman be given?
- Adequate replacement of thyroxine (esp. in the 1st trimester)
What is the pathophysiology of Type 1 diabetes?
Autoimmune destruction of beta cells of islets of Langerhans in the pancreas.
What is the pathophysiology of Type 2 diabetes?
- Characterised by insulin resistance
- Genetic component is stronger than for type 1
- Incidence increases with age and degree of obesity
What is the pathophysiology of gestational diabetes?
- Carbohydrate intolerance first recognised in pregnancy
- Risk of developing Type 2 Diabetes within 10 - 15 years.
How should you manage Diabetes pre-conception?
- HbA1c < 48mmol / l
- Folic acid 5mg
- Stop ACEi + Statins
- Retinal screening
- Renal function and microalbuminuria