Whether a couple is planning a pregnancy or surprised by a unplanned pregnancy, its always good to know how the baby is developing week to week or month to month. The use of a pregnancy calculator is perfect for this. The benefits of a pregnancy calculator will not only tell you the date of conception, the estimated due date, but many calculators will come with a pamphlet or book explaining what is going on with your baby and body on either a weekly or monthly bases. This is especially great for first time mom’s as it can be very scary having your baby change and knowing what to expect makes it a lot less stressful, as stress is not good for you or your baby. Many fathers appreciate the benefits of a pregnancy calculators, as some dad’s to be feel left out while patiently waiting for baby to come, many couples who have used the calculator say it has made the bound between them stronger.