Tag: due date calculator


Perhaps, having done the pregnancy hCG strip test, you have confirmed that you are pregnant, or you got to know after a consultation with your doctor, the next big question that comes to mind is ‘when am I due?’ While an answer termed an estimated due date is usually provided by a gynaecologist or your general medical practitioner, it is quite interesting to know that computer programs, often referred to as ‘pregnancy calculator’, ‘pregnancy confirm calculator’, or ‘pregnancy due date calculator’ have been developed to answer that question, in such a way that, the answer produced by such computer program matches the one provided by your gynaecologist.

However, the way such computer programs could predict the due date that matches the ‘estimated due date’ predicted by a gynaecologist therefore leaves one in awe. It should however be noted that the mechanism or basic principle on which such computer program is based, is quite similar to the basic medical principle employed by your doctor in providing an estimated due date.

Here is how it works!

The basic medical principle on which a pregnancy calculator works is such that, having supplied the date of your last menstrual period (LMP), three months is subtracted from the first day of your last menstrual period, then seven (7) days are added to it, this gives the ‘estimated due date’. Therefore, in programming, the programmer programs such that the program requests for the date of the last menstrual period and subtracts three months, followed by an addition of seven days, to display an ‘estimated due date’.

Take for instance, if your last menstrual period began on April 10th. On entering this information into the Last Menstrual Period (LMP) field on request of the computer program, the program goes on to subtract three months from the supplied date, which gives January 10th, followed by an addition of seven days, which eventually gives January 17th as the estimated due date (displayed instantly on the screen or sent to the email you supplied).

However, it should be noted that more often than not, the estimated due date calculated does not always turn out to be the date of delivery, as the actual delivery could take place a week or two before or after the estimated due date. This is because; the gestation period lasts from about 38 weeks to 40 weeks, which as such, obscures the possibility of an accurate date of delivery prediction.

Also, this system of predicting the due date, works better for people with a regular menstrual cycle and those who noted the date the last menstrual period (LMP) started. Therefore, with a knowledge of how the pregnancy calculator works, you would find it easier to either calculate your estimated due date or understand the principle your gynaecologist or general medical practitioner has employed in predicting the estimated due date. If however, you did not notice the start of your Last Menstrual Period (LMP), due to an irregular menstrual cycle, your general medical practitioner or gynaecologist would employ other methods to detect the stage of pregnancy you are in and the number of weeks you have been pregnant, such test include: Ultrasound scan, measurement of the height of your fundus and detection of the first fetal heartbeat.

Pregnancy Calculator, How Many Weeks Am I?

As soon as the doctor confirms you are pregnant the first question that comes to your mind is, “how far am I?”. It is important to be up to date with months, weeks and days of your pregnancy. Today, things have become easier and faster. You can access a pregnancy calculator online that will help you keep track of time by giving you information that includes the day, week, month and trimester that you are in.

How do you know you are pregnant?

As soon as you notice you have missed your periods or you think you might be pregnant, you can get a home pregnancy test kit. This can be purchased over the counter at a very affordable price. This is usually a urine test. You pee on it then wait for some minutes to get the result. If you see one red line, it means that you are not pregnant. Two red lines mean you are pregnant.

After this, you might want to visit a doctor to confirm if you are truly pregnant.

How do you know how far along you are?

It is almost impossible to tell without a doubt when you conceived. Many doctors will use your last menstrual period(LMP) to estimate how far along you are. You will be asked when your last monthly period started. This date will be considered as the first moment of pregnancy.

However, some women prefer to tally their pregnancy from their ovulation day date. This gives a mother the expected date of conception which is usually fourteen days after last menstrual period. In this case, the woman whose first day of conception is considered to be her LMP is two weeks advance along in her pregnancy. Therefore, the doctor will reveal that you are pregnant two weeks longer than you are.

What is a pregnancy calculator?

This calculator calculates how far along you are by allowing you to enter your first date of LMP and the average length of your periods. This calculator calculates how far along you are. In this case, you do not need to visit a doctor to know how far along you are. You can easily access these pregnancy calculators online.

How does a pregnancy calculator work?

In every menstrual cycle there are 5 days for ovulation which is usually 14 days before your period.  Using this information and the one you provided, it can calculate how far along you are and your due date.

What if I have a sporadic menstrual cycle?

This method of calculation works best for people with regular periods of 28 days each. If you have sporadic flow, chances are you do not remember the date of your LMP. To be more exact, you can wait for your first ultrasound filter (dating check). The sonographer will consider your child’s crown posterior length(CRL). This will enable him/her to give a thought on how far along you are.

The pregnancy calculator is a great tool to use. It is convenient and private. However, visit your gynecologist always for any questions.