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Due Date Pregnancy

Due Date Pregnancy

A pregnant woman would want to know her due date or her delivery date. A woman wants to know the due date the moment she knows she is pregnant. It is not a very difficult task to know her due date. There are many methods of calculating the due date. Usually, the due date falls after completing 40 weeks of pregnancy. Today, usually if a woman does not face labour on the due date or after the due date, the doctor suggests the woman undergo a cesarean operation.

How is the due date calculated?

Pregnancy due date is the date when a woman is expected to face labour and deliver the baby. Due date of the pregnancy can be calculated based on the date of conception. The date of the conception falls usually 20 days after the process of ovulation. Hence the due date falls of pregnancy falls 38 weeks after conception.

Techniques of calculating pregnancy

The technique of ultrasound also gives an idea about your baby’s gestational age. Ultrasound is an examination that is conducted for a pregnant woman to know about the baby’s condition in the womb. It also helps to know the gestational age. It is completely a painless procedure. This test can be conducted within five to six weeks of your last menstrual period.

By the method of ultrasound, the exact date of the last menstrual period can be known. And on this basis, the due date of pregnancy is known. Doctors usually suggest conducting sonography within a period of 8 to 18 months. Some woman faces irregular menstrual cycles. They cannot exactly determine their due date of pregnancy. When they undergo an ultrasound test, they can calculate the exact due date. But still, if the size of the baby is small or big adequate information cannot be provided about the baby.  It is difficult to know the exact date of your conception. Usually, the last date of your previous menstrual cycle is taken into consideration and the due date is calculated.

Today, due to the advance in technology and the invention of the internet, it is possible to calculate the due date of pregnancy online. The best way to calculate your due date is by adding 280 days beginning from the first day of the last menstrual cycle. The techniques of calculating the due dates of your pregnancy existed since olden days. In 1950, Dr Naegele, circa was the first person to calculate the due date. He determined that the normal period of gestation of a woman was 266 days. He found out that the cycle usually lasted for 28 days and the woman usually ovulated on the 14th day of her cycle.

He calculated the due date by using the following formula: ((LMP + 7 days) – 3 months) = Due Date

But the doctor did not consider some points. Not every woman ovulates on the 14th day of her ovulation. Many other factors help to determine the due date such as care, proper nutrition and the other screening factors. Recently, the doctors have recommended that 15 days should be added if a woman is to undergo a cesarean delivery.  Even the first time to-be moms face labour process 10 days late. Anyhow, ultrasound is considered to be the most effective theory for calculating the due date. The woman should conduct the ultrasound test during the first six months of her pregnancy or else after six months, the exact due date cannot be calculated.

Medical experts say that there are several factors of determining a due date. The other factors that determine the due date are:

  • the first time when the mom feels the movement of the baby.
  • Heart tones heard from the Doppler and statoscope.  
  • The uterus of the baby is measured.

There are times when the due date given by the doctors turns out to be wrong such as implantation bleeding etc. but a woman needs to know her accurate due date because she can prevent misleading parental test results like maturity. Most of the medical experts recommend doctors not to announce the exact due date but to tell the woman about the monthly frame such as ‘By the end of March’ or ‘beginning of April’. But if the woman knows the exact due date he will develop anxiety as the day approaches.

If the due date passes away without the experience of labour, then the woman develops more anxiety. Most of the woman face labour after completion of 42 weeks. The American College of Obstetricians and Gynecologists (ACOG suggest that if the woman does not face labour even after 42 weeks, then labour should be induced to her. Anyhow, it is a difficult task for a doctor to tell the exact due date because the woman does not accurately know the date of her conception. He can just approximately tell you the date of delivery.

Let us take an example for calculating due dates:

Say, the total gestation period of the woman is for 10 months. If the last period of the woman was from 1st of January, then calculate 40 weeks after the 1st Jan and the date falls on the 1st of 1st November. From the date of 1st November, you can reduce 14 days and the due date will be calculated on the 15th of October. The 14 days are reduced from the 44 weeks because the total period of gestation is for 10 months. The woman ovulates in two weeks when calculated from the last menstrual period.

Some of the popular websites that provide comprehensive information about the due dates are,, and much more. You just enter your last date, day and months of your monthly cycle and you will get the result of your due date. If a baby is born before 37 weeks of pregnancy it is considered to be a premature baby. If a baby is born before 37 weeks of pregnancy it is considered to be a premature baby

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