Most people think of a pregnancy as nine months long, and when they ask you how far along you are, they expect to hear an answer in terms of months, or possibly trimesters.
To calculate your due date, you take the first day of your last menstrual period, add nine months, and add one week.
Create your pregnancy calendar, enter your due date: Don't know your due date?If you're new to our site, register to personalize BabyCenter for your pregnancy, new baby, child, or children.JustMommies pregnancy pregnancy Calendar, pregnant moms find out what is going on with your pregnancy each day.Using that measurement, it is also easy to calculate trimesters.Either way, the count will be over soon enough, and youll face a new challenge: aisc manual of steel construction pdf figuring out whether to measure your babys age in weeks or months.Months 1-3 would be your first trimester, months 4-6 would be your second trimester, and months 7-9 would be your third trimester.See what's new each week by entering your pregnancy due date or child's birthday below for a personalized weekly calendar.(Most due date calculators allow you to make this adjustment.) You may also need to make adjustments if youre not sure about the first day of your last menstrual period, especially if you tend to have irregular cycles or spotting.(By this measure, most pregnancies are not confirmed until you are five weeks pregnant.).This is the method that most doctors use, and the method by which most experts measure fetal development.
Each lunar month consists of four weeks, of seven days each.
Of course, all of these calculations assume that you have a standard 28-day menstrual cycle.
To make things more confusing, the count begins with the first day of your last period before you were even technically pregnant.Youll still have an estimated due date of October.To put this method to work, lets go back to the first example again: Youre pregnant, and the first day of your last menstrual period was January.But at the time of your ovulation, about January 15, you will have been considered two weeks pregnant.You'll get a daily dose of interesting and helpful information about your growing child.