Gynaecology

Antenatal EDD & Screening

Calculate estimated due date and view your current position on the antenatal timeline with context-aware screening and supplementation guidance.

Calculate EDD

Estimated Due Date

Pregnancy Timeline (hover notches for screening details)

Past screening

Upcoming screening

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Calculators

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Cardiovascular Risk Stratification
PREDICT-CVD 5-year cardiovascular risk for NZ patients, with Framingham, QRISK3, SCORE2, and ACC/AHA for comparison.
CHA2DS2-VASc
Stroke risk in atrial fibrillation and anticoagulation decision support.

Paediatric Dosage Calculator
Weight- and age-based dosing aligned to NZFc and Starship guidelines.

Substance Risk Calculator
Alcohol (AUDIT), cannabis, and nicotine/vaping risk profiles with evidence-based harm summaries and cessation guidance.
Antidepressant Weaning
Tapering schedules and cross-tapering transitions. Covers SSRIs, SNRIs, TCAs, and mirtazapine.
Psychotropic Selector
Filterable reference for 22 agents: NZ dosing, side effects, CYP450, cost, and pregnancy safety by indication and class.
Benzodiazepine Conversion
Diazepam-equivalent conversion for 11 agents including Z-drugs. Switching protocols and dependence management.

Adult NZF Browser
GP-relevant medicines with PHARMAC funding status, prescriber requirements, and NZ dosing. Filterable by category, funding, and prescriber type.
Opioid Converter
Conversion across 9 opioid agents including transdermal patches. Aligned to NZ HealthPathways guidance.
Steroid Equivalent Calculator
Glucocorticoid potency and dose comparison (prednisolone equivalent).
Prescriptions Outside NZ
Medicines prescribed overseas that are unavailable, unfunded, or differently restricted in NZ -- with local equivalents.
Anticholinergic Burden
Cumulative ACB score across a patient medication list, with STOPP flags and deprescribing guidance.

Geriatric Assessment Toolkit
FRAIL, Katz ADL, Lawton IADL, and Rockwood CFS for frailty and functional assessment.

COPD Management
BPAC/GOLD-staged medication selector with NZF-subsidised inhaler options.
Due Date Estimator
Naegele rule and gestational age by LMP or ultrasound.
CTS-6 (Carpal Tunnel Score)
Kamath and Stothard six-item weighted score for CTS probability.