Enter LMP or ultrasound dating to see current gestational age, EDD, and the MBS antenatal items triggered by gestational age. RANZCOG-aligned reference, not advice.
Assumes 28-day cycles (Naegele’s rule). For irregular cycles, prefer ultrasound dating.
Enter the GA from the ultrasound report. EDD will be back-calculated from this dating.
Generated for the dating above. YOU ARE HERE marks the current GA. Past milestones are green; upcoming are grey.
| Item | When | Description | Fee |
|---|---|---|---|
| 55700 | <12 weeks | Dating scan — gestation, location, viability, number of fetuses. | $70.65 |
| 55707 | CRL 45–84mm | NT scan with nuchal translucency measurement (referred). ~11+2 to 13+6 weeks. | $82.50 |
| 55708 | CRL 45–84mm | NT scan, non-referred. Same window as 55707. | $41.15 |
| 55709 | 17–22 weeks | Fetal morphology with dating measurements. | $44.70 |
| 55718 | >22 weeks | Fetal anatomy ultrasound (referred). For follow-up/late anatomy. | $117.85 |
| 16590 | ≥28 weeks | Pregnancy planning & management — GP with maternity privileges (private admission planned). Includes MH screen + DV + drug/alcohol screening. Once per pregnancy. | $446.15 |
| 16591 | ≥28 weeks | Pregnancy planning & management — shared care (no maternity privileges). Same MH/DV/drug screen requirement. Once per pregnancy. | $170.75 |
Routine GP antenatal visits bill under standard attendance items (23 / 36 / 44) per visit. 16590 and 16591 are the one-off "planning" items billed once after 28 weeks. They are mutually exclusive — pick the right one based on the patient’s care model.
First-trimester combined screening (PAPP-A + free βhCG + NT) typically 11–13+6 weeks. NIPT (cell-free DNA) from 10 weeks. NIPT is not currently MBS-rebated — patients pay privately (~$400–500). PAPP-A bloods are MBS-funded.
Universal 75g 2-hour OGTT at 24–28 weeks per RANZCOG/ADIPS. Earlier OGTT (12–14 weeks) if high risk (BMI ≥35, prior GDM, prior macrosomia, PCOS, family history).
Routine anti-D prophylaxis at 28 and 34 weeks if Rh(D)-negative and no anti-D antibodies. Plus after sensitising events (CVS, amniocentesis, ECV, abdominal trauma, antepartum bleeding). Provided through the National Blood Authority — not an MBS-billable consumable.
Universal vagino-rectal swab for Group B Streptococcus at 35–37 weeks per RANZCOG/RCH. Positive result → intrapartum antibiotic prophylaxis.
Influenza — any trimester. dTpa (pertussis) — 20–32 weeks (NIP-funded). RSV (Abrysvo) — 28+ weeks each pregnancy (NIP from Feb 2025). COVID-19 per current ATAGI advice. Live vaccines (MMR, varicella) contraindicated.
MBS item 16501 ($168.20) covers ECV for breech presentation after 36 weeks in a facility with caesarean capability. Maximum 2 ECVs per pregnancy.
Reference information for healthcare professionals. Calculator outputs are based on standard formulas (Naegele’s rule / CRL-based dating). Always reconcile with documented obstetric dating and current clinical context. Not a substitute for clinical judgement or the treating obstetric team’s plan.