Calculate your estimated due date, find out how many weeks pregnant you are, and see your personalised pregnancy milestone timeline.
The estimated due date (EDD) is calculated using Naegele's rule: add 280 days (40 weeks) to the first day of your last menstrual period (LMP). This assumes ovulation occurred on day 14 of a 28-day cycle.
If your cycle is longer or shorter than 28 days, we adjust the calculation by adding or subtracting the difference. For example, a 32-day cycle adds 4 extra days before ovulation, so the EDD shifts forward by 4 days.
If you know your conception date (e.g. from IVF), we add 266 days (38 weeks) to that date instead.
A dating ultrasound in the first trimester (ideally 8–12 weeks) is the most accurate way to confirm your due date, typically within 5–7 days. If your ultrasound date differs from the LMP date by more than 7 days, your clinician will usually use the ultrasound date.
The Australian antenatal guidelines (RANZCOG / Department of Health) recommend a minimum of 10 antenatal visits for a first pregnancy and 7 for subsequent pregnancies. Your schedule may vary based on your care model (GP shared care, midwife-led, private obstetrician, or hospital clinic).
Most antenatal care in Australia is covered by Medicare. If you choose a private obstetrician, there will be out-of-pocket costs — ask your obstetrician's rooms for a written estimate before committing.
Register with your hospital or birthing centre as early as possible — some fill up quickly. Your GP can provide a referral.