What Is A Pregnancy Calculator?

Pregnancy calculator is a simple tool for those who wish to confirm whether they are pregnant or not. This is based on your menstrual period, symptoms that you have and the tests that you have done. Pregnancy normally lasts from 37-42 weeks from the first day of your last period. This is also used to figure out the estimated date and compute the likely conception date. This tool can also determine the end of the first and second trimesters, determine the weeks you've been pregnant, estimate fetal age, determine the weeks you are pregnant over a given date, estimate which date you'll be pregnant the particular number of weeks, and figure out the possible conception date when you realize the birthday or delivery date.

How To Use A Pregnancy Calculator?

You can use it by simply entering the date of your last menstrual and the number of days in your menstrual cycle into the pregnancy calculator, and click on the calculate button. Normally, during menstrual cycle, there are 28 days and it can last from as little as 22 to as long as 44 days. In a detailed manner, you have to locate first a free pregnancy calculator online, and enter the date of your last menstrual period into the calculator. Some calculators let you select the number of days of your typical cycle. Second, Press the calculate button and you will get the results for your expected delivery date. Fourth, you can use the results of the calculator to determine the week of your pregnancy. This will help you to monitor the growth and development of your growing baby. And lastly, discover the date of conception.

Naegele's Rule - Manual Pregnancy Calculator

If you want to use the "Naegele's Rule", you should use the date of your last period. It is a common way to calculate your expected delivery date, named after the German obstetrician who devised the method over 150 years ago. To calculate your estimated due date using Naegele's Rule, take the first date of your last menstrual period and count back three month, followed by adding seven days to this date, and the result would be your baby's due date. For example: your LMP is November 20, subtract three months and the result is August 20, followed by adding 7 days resulting to August 27. August 27 is your expected date of delivery. This method is suggested to women with regular 28 days cycle.

If you have a shorter day cycle such as a 24 day cycle, you will need to adjust your estimated date of delivery accordingly. With the same example mentioned above, you should subtract four days from the date given. Instead of August 27, the estimated date will be August 23.

If you have longer cycle such as a 30 day cycle, you will also need to adjust your estimated delivery date consequently. With the same example given, you should add two days to get the adjusted date of delivery. Instead of August 27, the estimated date will be August 29.

Always remember that Naegele's Rule is not always accurate, as many babies arrive before they are due and others later than expected.

For help and information relating to pregnancy due dates visit Newborn Baby. Helping thousands of Australian Parents every month with pregnancy calculator week by week information and other baby related topics.