Last reviewed: May 2026 | Written by the MplusX Editorial Team
📌 Key Takeaways
- OB/GYN accounts for approximately 12.5% of the AMC MCQ — ~15 scored questions split roughly 50/50 between obstetrics and gynaecology.
- The most tested areas: pre-eclampsia, postpartum haemorrhage, ectopic pregnancy, cervical screening, and PCOS.
- Australian-specific screening schedules (HPV test, not Pap smear) are frequently mistested by IMGs.
- Primary CTA: Try MplusX free — filter to OB/GYN and see what Australian-context questions look like.
OB/GYN is one of those AMC MCQ domains that looks manageable on the surface.
You trained in obstetrics and gynaecology. You have delivered babies. You have managed PPH. You know what pre-eclampsia looks like.
Then you sit the AMC MCQ and the cervical screening question asks about HPV testing intervals and your brain reaches for the 3-yearly Pap smear answer — which has not been used in Australia since 2017. Reading about MplusX vs AMEDEX might also be helpful.
Australian OB/GYN is not dramatically different from international OB/GYN. But the specific differences are tested directly and repeatedly. Miss them and you are giving away marks in a domain where you should be strong.
This guide maps exactly what those Australian-specific differences are and where the high-yield marks live.
Obstetrics High-Yield Topics
Pre-Eclampsia
Pre-eclampsia is one of the most consistently tested obstetric conditions. Every sitting includes at least one pre-eclampsia question.
Diagnostic criteria (2026 Australian definition):
- Hypertension (≥140/90 mmHg on two readings 4 hours apart) at ≥20 weeks gestation
- Plus at least one of: proteinuria (≥300mg/24hr or protein:creatinine ratio ≥30 mg/mmol), renal impairment, liver involvement, neurological features, haematological complications, or uteroplacental dysfunction
Note: Proteinuria is no longer required to diagnose pre-eclampsia if other end-organ involvement is present. This is a common trap — many candidates still apply the older definition requiring proteinuria.
Management priorities: 1. Antihypertensive therapy: Labetalol (IV) or hydralazine (IV) for acute severe hypertension (≥160/110). Oral nifedipine or methyldopa for non-severe hypertension. 2. Magnesium sulphate: For seizure prophylaxis in severe pre-eclampsia (also treatment for eclamptic seizures). 3. Corticosteroids: If <34 weeks gestation — betamethasone for fetal lung maturity. 4. Delivery: Definitive treatment. Timing depends on gestational age and severity.
AMC trap: The question often presents a patient with headache, visual disturbance, and epigastric pain at 32 weeks with elevated BP. The correct management includes magnesium sulphate — not just antihypertensives alone. Missing the magnesium = missing the mark.
Postpartum Haemorrhage (PPH)
PPH is defined as blood loss ≥500ml within 24 hours of delivery (primary PPH) or ≥1000ml for caesarean section.
The 4 Ts — Causes of PPH:
| Cause | Description | Initial Management |
|---|---|---|
| Tone (most common, 70–80%) | Uterine atony — uterus fails to contract | Uterine massage + oxytocin IV, ergometrine, misoprostol |
| Trauma | Lacerations, uterine rupture, haematoma | Surgical repair, examination under anaesthesia |
| Tissue | Retained placenta or placental fragments | Manual removal, surgical evacuation |
| Thrombin | Coagulopathy (DIC, anticoagulation) | FFP, platelets, cryoprecipitate, tranexamic acid |
First-line uterotonic: Oxytocin IV (Syntocinon). This is the Australian first-line — not ergometrine.
AMC trap: The question may include ergometrine as an option. Ergometrine is contraindicated in hypertension — if the patient also has pre-eclampsia or known hypertension, oxytocin alone is the correct first-line choice.
Ectopic Pregnancy
A time-critical diagnosis that appears regularly in AMC MCQ questions.
Presentation: Amenorrhoea (typically 6–8 weeks), unilateral pelvic pain, vaginal spotting. If ruptured: sudden-onset severe pain, haemodynamic instability, peritonism.
Investigation pathway: 1. Urine and serum beta-hCG 2. Transvaginal ultrasound (TVS) — intrauterine pregnancy or empty uterus with adnexal mass 3. If beta-hCG >1,500 IU/L and no intrauterine pregnancy on TVS → ectopic until proven otherwise
Management:
- Haemodynamically unstable: Emergency laparoscopy (or laparotomy if unstable) — resuscitate and operate simultaneously
- Haemodynamically stable, beta-hCG <5,000, no fetal cardiac activity: Methotrexate (medical management) — requires counselling and follow-up beta-hCG
- Haemodynamically stable, beta-hCG >5,000 or fetal cardiac activity: Surgical management (laparoscopic salpingostomy or salpingectomy)
AMC trap: Medical management with methotrexate is only appropriate when the patient is haemodynamically stable, beta-hCG is below the threshold, and there is no fetal cardiac activity. Selecting methotrexate for an unstable patient = wrong answer.
BP ≥140/90 + end-organ involvement
→ Labetalol IV + Magnesium sulphate
→ Consider delivery by gestational age] OE –> PPH[Postpartum Haemorrhage
Blood loss ≥500ml post-delivery
→ Uterine massage + Oxytocin IV first-line
→ Assess 4 Ts cause] OE –> EP[Ectopic Pregnancy
Empty uterus + beta-hCG >1500 + adnexal mass
→ If unstable: emergency laparoscopy
→ If stable + low hCG: methotrexate]
style PE fill:#0F2D5C,stroke:#fff,color:#fff style PPH fill:#2A7D7B,stroke:#fff,color:#fff style EP fill:#991B1B,stroke:#fff,color:#fff
Gynaecology High-Yield Topics
Cervical Screening — The Australian Programme
This is the single most frequently missed area for IMGs in the OB/GYN domain.
The current Australian programme (since 2017):
- Test type: HPV test (co-test with LBC/Pap cytology is not routine — HPV test alone)
- Age range: 25 to 74 years
- Interval: Every 5 years for HPV-negative women
- Exit test: At 70 to 74 years (last routine test before age 75)
What is NOT used in Australia:
- Annual Pap smears
- 3-yearly Pap smears (the old programme)
- Smear testing before age 25
AMC trap: A question presents a 23-year-old woman asking about cervical cancer screening. The correct answer is to advise that screening begins at age 25 with the HPV test — not to perform a Pap smear now.
Abnormal result management:
- HPV positive (any type) → LBC reflex testing
- HPV 16/18 positive → urgent colposcopy referral regardless of LBC result
- Other HPV types positive + LBC abnormal → colposcopy referral
- Other HPV types positive + LBC normal → repeat HPV test in 12 months
Polycystic Ovarian Syndrome (PCOS)
Diagnosis (Rotterdam Criteria — at least 2 of 3): 1. Oligo/anovulation (irregular cycles) 2. Clinical or biochemical hyperandrogenism (hirsutism, acne, elevated testosterone) 3. Polycystic ovaries on ultrasound (≥12 follicles per ovary or ovarian volume >10ml) Reading about best AMC MCQ resources might also be helpful.
Management — feature-based approach:
| Feature | Management |
|---|---|
| Irregular cycles | COCP (regulates cycle, reduces androgen) |
| Hirsutism/acne | COCP ± anti-androgen (spironolactone) |
| Anovulatory infertility | Lifestyle modification first → letrozole (first-line ovulation induction in Australia) → clomiphene → FSH |
| Metabolic risk (insulin resistance) | Lifestyle modification → metformin |
AMC trap: The first-line treatment for anovulatory infertility in PCOS is now letrozole in Australian guidelines — not clomiphene. This changed in recent years and the update is directly tested.
Endometriosis
Presentation: Cyclical pelvic pain, dysmenorrhoea, deep dyspareunia, infertility. Laparoscopy required for definitive diagnosis.
Management:
- Pain management: NSAIDs first-line, COCP second-line, progestins (norethisterone, medroxyprogesterone), GnRH agonists for severe disease
- Fertility: Surgical ablation of endometriotic lesions improves spontaneous conception rates. ART (IVF) for severe disease or failed surgical treatment
AMC trap: Medical management (COCP, progestins) does not cure endometriosis — it manages symptoms. Patients wishing to conceive cannot use hormonal suppression and require surgical or ART options.
Pelvic Inflammatory Disease (PID)
Diagnosis: Clinical — lower abdominal tenderness, adnexal tenderness, cervical motion tenderness. No single test is definitive.
Criteria for admission:
- Severe illness (unable to tolerate oral medication)
- Surgical emergency cannot be excluded (ruptured tubo-ovarian abscess)
- Pregnant patient
- No response to outpatient treatment within 72 hours
- Non-compliance concerns
Antibiotic selection (per eTG — inpatient): Ceftriaxone IV + doxycycline IV/oral + metronidazole
AMC trap: The question often presents a mild PID case. Outpatient management with oral antibiotics is appropriate for mild cases if criteria for admission are not met. Do not admit every PID case.
~7-8 scored questions] –> G1[Cervical Screening
HPV test, 5-yearly, age 25–74
NOT annual Pap smear] G –> G2[PCOS
Rotterdam criteria
Letrozole first-line for anovulatory infertility] G –> G3[Endometriosis
Laparoscopy for diagnosis
NSAIDs/COCP for pain] G –> G4[PID
Outpatient if mild
Ceftriaxone + doxycycline + metronidazole inpatient] G –> G5[Menopause
HRT — indications and contraindications
Vaginal oestrogen for GSM]
style G fill:#0F2D5C,stroke:#fff,color:#fff style G1 fill:#2A7D7B,stroke:#fff,color:#fff style G2 fill:#2A7D7B,stroke:#fff,color:#fff style G3 fill:#2A7D7B,stroke:#fff,color:#fff style G4 fill:#2A7D7B,stroke:#fff,color:#fff style G5 fill:#2A7D7B,stroke:#fff,color:#fff
Study Strategy for OB/GYN
Allocate 2 dedicated weeks to OB/GYN — matching its 12.5% blueprint weight.
Prioritise these 5 areas in order of AMC question frequency: 1. Cervical screening (most commonly missed due to Australian-specific programme) 2. Pre-eclampsia (appears in almost every sitting) 3. PPH (4 Ts framework + first-line oxytocin rule) 4. Ectopic pregnancy (stability dictates management) 5. PCOS (letrozole update for infertility)
One rule to memorise immediately: Australia uses the HPV test (5-yearly, from age 25). Not Pap smears. Never select a Pap smear option on a cervical screening question unless asked about historical context.
Frequently Asked Questions
What is the most important OB/GYN topic in the AMC MCQ?
Cervical screening is the most consistently missed topic by IMGs. The shift from 3-yearly Pap smears to 5-yearly HPV testing (from age 25) is directly tested and candidates from international training backgrounds frequently select the incorrect answer due to their home country’s programme. Know the current Australian programme.Is pre-eclampsia always tested in the AMC MCQ?
Pre-eclampsia appears in almost every sitting — sometimes multiple times across different question scenarios. Know the current diagnostic criteria (end-organ involvement, not necessarily proteinuria), the antihypertensive choices, and the non-negotiable role of magnesium sulphate for seizure prophylaxis in severe pre-eclampsia.Do I need detailed surgical knowledge for OB/GYN questions?
No. As with Surgery, OB/GYN questions test initial clinical management decisions — not operative technique. You need to know when to operate (ruptured ectopic, PPH unresponsive to uterototics) versus when to manage medically, but not the surgical details themselves.References
- John Murtagh‘s General Practice (8th Edition): Chapter 91: Cervical cancer screening, Page 2452; Chapter 93: Breast disorders, Page 2492; Chapter 94: Abnormal uterine bleeding, Page 2535; Chapter 95: Lower abdominal and pelvic pain in women, Page 2552; Chapter 100: Basic antenatal care, Page 2647
- RACGP Red Book (10th edition): Chapter 9.3: Breast cancer, Page 109; Chapter 9.5: Cervical cancer, Page 117
- Therapeutic Guidelines (eTG): Part 3 Sexual and Reproductive Health: Contraception and Pregnancy
Disclaimer: This article is written for AMC MCQ examination preparation and general informational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. Clinical decisions should always be based on individual patient assessment, current Australian Therapeutic Guidelines (eTG), and consultation with qualified healthcare professionals. MplusX is an exam preparation platform and is not a substitute for supervised clinical training.