Most pregnancies last around 40 weeks (or 38 weeks from conception), so typically the best way to estimate your due date is to count 40 weeks, or 280 days, from the first day of your last menstrual period (LMP). Pregnancy Calculator. Another way to do it is to subtract three months from the first day of your last period and add seven days. So if your last period started on April 11, you’d count back three months to January 11 and then add seven days, which means your due date would be January 18. T his is how your doctor will estimate your due date — and it’s a pretty solid target. But remember: It’s just as normal to deliver a week or two before or after. Use Our Pregnancy or Gestation Calculator
Calculating your due date based on the first day of your last period works well for women who have a relatively regular menstrual cycle. But if your cycle is irregular, the LMP method may not work for you. Because a reliable estimated date of delivery (EDD) is important, you and your practitioner can use your conception date instead if you remember it. Just add 266 days to get your estimated due date. Use Our Pregnancy Calculator to Calculate your Due Date
There are more than 250,000 assist reproductive technology cycles performs each year in the United States, resulting in about 77,000 or more babies born a year, according to the Centers for Disease Control and Prevention (CDC). If you are part of the growing tribe of IVF moms, you can calculate your due date more precisely using your IVF transfer date. Use Our Pregnancy Calculator to Calculate your Due Date
Even if you can’t pinpoint when you conceived, forget the day of your last menstrual period or aren’t sure when ovulation occurred, other clues can help you and your practitioner determine your due date at your first prenatal appointment, including:
Whether you’re trying to avoid being very pregnant in the middle of summer or are a teacher who wants to maximize time off with your little one, you can try to time when you conceive in order to “plan” Your Due Date . But even if you’re one of the lucky ones who’s able to get pregnant when she really wants to, just remember that you probably won’t be able to map out exactly when you’ll give birth to the day (or even the week or month!).
Yes, your due date can change. While it’s definitely not a reason to worry, your doctor may change your due date for a number of reasons as your pregnancy progresses. It may be that your periods are irregular and your early ultrasound dating was off, or that your first ultrasound was in the second trimester. It could also be because your fundal height is abnormal, or your levels of alpha-fetoprotein (AFP), a protein make by the baby, are outside the usual range. Talk to your practitioner if you have any questions or concerns. Use our Pregnancy Calculator to Calculate your Due Date.