In ancient Egypt, the Egyptians used a woman’s urine to establish if she was pregnant or not. They would urinate on certain grains and if the grains germinated, the woman knew she was pregnant. Imagine having to wait a few days for the result. Fortunately for us, times have changed, now we simply pee on a plastic stick and we have the results in a matter of minutes.

When you do find out that you’re pregnant, one of the greatest joys is knowing exactly when to expect your baby’s appearance into the world. This gives you a sense of control so that you can plan everything in advance and prepare yourself for your little one’s arrival.

Continue reading to find out how to calculate your due date so you can be prepared for your little one’s grand entrance into the world.

 

Using Dates

Most women are not 100% sure when they ovulated or when conception took place. To help in ascertaining the due date, science has made it quite easy. Your due date or EDD, Estimated Date of Delivery, is calculated by adding 280 days or 40 weeks to the first day of a woman’s last menstrual period. This might seem a bit odd because you were not pregnant on the first day of your period, but this helps the medical field to calculate your due date as precisely as they can. You can, therefore, take the date of your last period and use a diary and start adding 280 days to find your due date.

 

Ultrasound

Another way to calculate your EDD and therefore how many weeks pregnant you are is by asking your doctor to do an ultrasound. This is done in the first trimester, and the earlier the better. This is because the measurements provided in the first trimester are the most accurate estimation of your baby’s age because all fetuses tend to develop at the same rate.

The doctor will measure the baby from one end to the other, also known as the crown-rump length (CRL). Due to decades of research on many embryos and their crown-rump length measurements, the doctor will be able to give you a precise due date. Determining the EDD is generally not done this way in the second and third trimester because babies development rates are different in these gestation periods.

 

Due Date Calculator

But what if you can’t get to your doctor just yet and you really want to know your due date and how many weeks pregnant you are? Then, the due date calculator is the easiest way to calculate your due date. There are loads of apps and websites that you can use. All you have to do is enter the first day of your last period date and it automatically calculates your due date.

These handy tools use Naegele’s rule. This rule states that if you add one year from the date of your last menstrual period and subtract 3 months and add 7 days to that date, it will give an accurate due date. But instead of you having to figure it out, it does it for you automatically.

 

Accuracy

Very few babies are born on their projected due dates. They either make their appearance a few weeks before or a few weeks after the EDD. There are some other factors which may influence your due date, for example, if progesterone levels climbed more slowly in the first weeks of gestation, the baby can take longer to come. Also, the longer the embryo took to implant, the longer the gestation period.

Basically, the baby’s development rate causes late or early birth. In other words, the baby will come when he/she is good and ready. Think of it this way. Parenthood is a great way to work on the patience aspect of our personalities. Baby is just giving you a sneak peek of what’s coming.

 

It’s All Good

Whether your baby is early or late, try not to fixate on that date. Rather start daydreaming of the birthday parties, hugs, and kisses that you will share with your baby. And enjoy your pregnancy. It really is a miracle from heaven. You were chosen to be this baby’s mother and you are going to be a great one!