If you’ve not paid too much attention to keeping a note of when your last period has started or ended, and you noticed that you haven’t got your periods for more than a couple of months now, and you’re undergoing morning sickness, and feel lethargic and tired, without reason, it’s likely that you have conceived. Once it’s confirmed that you’re pregnant you can use pregnancy calculator available online to determine the most likely date of conception, the due date of delivery, the foetal age, and the number of weeks you’ve been pregnant.
 

The pregnancy calculator can be used by entering the date of your last menstrual period (you’ve to make a real effort to remember it accurately) and the number of days of your menstrual cycle (as this differs very much for various women), and then clicking on the calculate button. Within a few seconds, you get the information about the date on which you have most likely conceived, dates of the end of first and second trimesters, your due date of delivery (approximately after 40 weeks from conception), the foetal age, and the number of weeks you’ve been pregnant.
ovulationcalculator.org and ovulation calendars can be used to determine the most fertile period in a woman’s menstrual cycle. 
 
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