Many women initially have a due date that is later changed based on new or conflicting information. The most common means by which your provider will determine a due date is based on the first day of your last menstrual cycle. This calculation is most helpful when you have regular cycles.
Another very reliable way to determine a due date is with a vaginal ultrasound done between eight- and twelve-weeks’ gestation. If this date agrees with the date based on your last menstrual period it will be confirmed as your final due date.
If the ultrasound is done after twelve weeks, it is not as reliable in dating the pregnancy but will be part of what is used to provide your final due date. Your final due date is the one that you want to use in the StorkAdvisor app as it will then calculate gestational age and provide daily tips for you throughout your pregnancy and postpartum period.
Finally, for some women who have achieved a pregnancy by way of assisted fertility or they know the exact date they conceived, they will be provided a due date based on the date of known conception.