Use LMP for regular cycles
If you know the first day of your last period and your cycles are fairly regular, LMP dating is a simple starting point.
Pregnancy calculator
Estimate your due date, pregnancy week, trimester, and next milestone using your last period, IVF transfer date, conception date, or ultrasound dating.
LMP dating
Cycle-aware
IVF dating
Day 3, 5, 6
Scan dating
Weeks + days
This tool gives an estimate only. Your doctor may revise the due date after an ultrasound or based on your clinical history.
Choose the date you know best. IVF transfer and ultrasound inputs can give a more relevant estimate for many fertility patients.
Pregnant after fertility treatment or unsure about your dates? A Pluro specialist can help plan the right scan and follow-up.
Guide
If you know the first day of your last period and your cycles are fairly regular, LMP dating is a simple starting point.
For IVF pregnancies, embryo transfer date and embryo age usually make the estimate more relevant than cycle length.
If a scan report gives gestational age in weeks and days, ultrasound dating can help align the timeline with clinical dating.
Due date, current pregnancy age, trimester, likely conception date, and estimated LMP.
Irregular cycles, uncertain dates, scan findings, and clinical history can change dating decisions.
Ask your doctor if you have pain, bleeding, fertility treatment history, or uncertainty about dates.
Common questions
A due date calculator estimates 40 weeks of pregnancy from the first day of the last menstrual period, or adjusts the timeline using IVF transfer, conception, or ultrasound dating inputs.
No. The result is an estimate. Your doctor may revise the date after ultrasound dating, especially if cycles are irregular or the last period date is uncertain.
IVF dating can be more precise because the embryo transfer date and embryo age are known. The calculator adjusts the due date for day 3, day 5, or day 6 embryo transfer.
Scan timing depends on your history, symptoms, and treatment plan. If you conceived through fertility treatment, ask your clinic when to schedule the first scan and follow-up.
Next steps
If you conceived through fertility treatment or want clarity on scan timing, connect with a Pluro centre for personalised follow-up.