Midwives call due dates estimated due dates and treat them as such. It isn't always easy to calculate your due date. We learn in sex ed that we have 28 day cycles and ovulate on day 14. Right? I tried to conceive for a year. I tried every trick in the book. One day we had sex outside the "appropriate window" of time to conceive, and I became pregnant. After looking back at my charts and temperatures, I realized I ovulate around day 19-21, not day 14. No wonder it took us a year to get pregnant!
And why is this so critical? Because if your real due date is later then the due date calculated by your doctor, chances are you will end up with a premature baby. At least in this part of the country you will. I don't know about what things are like in your city but here, as you get close to your due date, doctors start talking about induction, and as you go past it, doctors ask you to get out your palm pilot and make room in your schedule for that special day. Repeat after me, I DO NOT NEED TO BE INDUCED IF BABY AND I ARE FINE. If your doctor is pushy (remember, he too learned about the 28 day cycle, I tried for a whole year using the wrong information and I consider myself a rather well-informed person, so he might need some help) ask him to do a bio-physical profile in order to assure your doctor (and you) that baby is fine. Beg for the bio-physical profile if necessary and if everything comes out ok and your doctor still wants to induce, please refuse. I have heard of too many inductions ending in cesareans. Birth can be beautiful, amazing,empowering. Starting labor off with an unnecessary induction can make it very hard to have an empowering birth.