Using a calculator helps in how to calculate the due date. It is accurate in terms of computation. However, the result doesn’t often reflect the actual date when you’ll give birth. You’ll only have the estimated date.
Also, do not be surprised if the doctor changes the estimated date of your baby’s arrival. Depending on how your baby’s doing (movement, heartbeat fundal height, etc.), the doctor may move your due date forward or back.
Furthermore, please keep in mind that Naegele’s Rule is based on a 28-day cycle. If you have a shorter or longer cycle, your doctor would make some adjustments.
Finally, if you do not know the first day of your LMP, don’t worry. In most cases, you only need to provide the week of your last period and the doctor would take care of the estimation.
Why is it Important to Calculate the Due Date?
Before your baby arrives, you can start preparing for the maternity go bag and newborn essentials. Additionally, determining when your baby is due helps you file for paternity or maternity leave.
In other words, learning how to calculate the due date helps you plan for your labor and delivery and mentally prepare for parenthood as a whole.
What if You Miss Your Due Date?
Like mentioned earlier, a due date calculator only gives an estimation; so missing your due date by a few days in both directions is usually not a cause for concern. Generally, the doctor would only be worried about premature birth or overdue babies.