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This calculator estimates your due date and full week-by-week pregnancy schedule using whichever information you have — your due date, the first day of your last period, an ultrasound date with gestational age, a known conception date, or an IVF transfer date. Each method calculates the same underlying timeline, adjusted for which starting point you're working from.
Note: this is an estimate based on average pregnancy length — your doctor's estimate, especially one based on an early ultrasound, is generally the most accurate for your specific pregnancy.
Pregnancy is typically dated from the first day of the last menstrual period (LMP) and lasts about 280 days (40 weeks), even though conception usually occurs about two weeks after the LMP.
This calculator works from whichever date you know — your due date, LMP, an ultrasound date with its measured gestational age, your conception date, or an IVF embryo transfer date — and converts it back to an estimated LMP to build a full week-by-week pregnancy schedule.
This tool is for general informational purposes only and does not replace guidance from your doctor or midwife.
Pregnancy is typically dated from the first day of the last menstrual period (LMP) and lasts about 280 days (40 weeks), even though conception usually occurs about two weeks after the LMP.
You can use whichever date you know: your due date, LMP, an ultrasound date with its measured gestational age, your conception date, or an IVF embryo transfer date.
It converts your known date back to an estimated LMP to build a full week-by-week pregnancy schedule.
No, this tool is for general informational purposes only and does not replace guidance from your doctor or midwife.
Yes, the calculator accepts an IVF embryo transfer date as one of the methods for building your pregnancy schedule.