Meaning of Expiration Date: the date after which a product (such as food or medicine) should not be sold because of an expected decline in quality or effectiveness
Meaning of Due Date: the day when a woman is expected to give birth
Due Dates hold a form of a magical power that a lot of us hang on too and fall for their magical and powerful ways. Here are some reasons why your due date is not accurate.
Your Cycle is different than others
We all know that our cycles are different. Do you know what your ovulation cycle is? If not, there is a way to track your temperature which you can take with the method. Most women who want to conceive can track their cycles in this way.
Your Period length was not thought of

You might tell me that you gave the date of your last period. But when they get this information without your ovulation cycle and the length of your typical cycle it is inaccurate.
Periods can last a length of 25-37 days and ovulation isn’t always halfway through the cycle. So, your Estimated Due Date is not a sensible one.
With these things in mind you need to think that there might be different dates that baby can come. Baby might come before your due date or after your due date.
Some people find it helpful not to listen to due date. When people ask when baby is due say something as follows. “I’m due anywhere in March or April.” That way you are free to have baby whenever. It can give your mind less stress and makes you really come to terms that baby comes when baby wants to come.
Anyone who knows me, knows my story. For my mother, I was due on Father’s Day so roughly June 21st etc. Right? Well my birthday is July 2nd. I was LATE in medical terms. My mother had a few inductions and they didn’t work until the fireworks of July 1st were bursting through the room and finally, I arrived in the early hours of July 2nd which I am told was a Sunday.
So, your due date is not an expiration date. Since your baby can come at any time really. So there is a little food for thought.