Here is a calculator that calculates but only due dates related to pregnancy and childbirth, and is virtual in its form; the doctors have it in their minds and you may access it on the Internet through one of its pregnancy related sites. An experienced older lady in the home can also do the same but probably she is not very confident and exact about it as doctors are.

One of the many uncertainties associated with pregnancy is the due date for delivery, also referred to as the D-Day. It is important to have an idea about the due date as it is ‘the thing’ pregnancy is all about. The nine-month long period is just waiting for its culmination in delivery. The whole preparation is for childbirth itself, and that itself involves a lot of preparation. Apart from making the arrangements related to the hospital stay, one needs to prepare mentally as well. The first time is so exciting and scary at the same time. At least I was strongly overcome by the feeling that I may or may not come back, despite so much advancement in medical science and despite the fact that I had a relatively trouble free pregnancy. Such is the impact of pregnancy on our emotions. Surprising, don’t you agree?

Even more surprising is the fact that the impact of positive and negative emotions starts as early as one notices the first sign of pregnancy and is in fact the hallmark of pregnancy. It is not uncommon to see pregnant ladies over reacting or getting elated at some point of time or depressed at other times for no particular reason. This state is taken to be an important sign of pregnancy and ample care is taken to keep the mother-to-be in a happy state and away from depressing thoughts. The reason is that the state of mind of the mother has a profound effect on the physical, mental, and emotional development of the fetus that will continue to affect throughout life.