Although there is some debate regarding when pregnancy technically begins, whether at fertilization of the egg (conception), or when the egg adheres to the uterus (implantation), gestational age does not vary based on different definitions of pregnancy since it is based on LMP. The default for this calculator bases the calculation on a woman's last menstrual period (LMP), under the assumption that childbirth on average occurs at a gestational age (age of a pregnancy calculated from the woman's last menstrual period) of 280 days, or 40 weeks. 1ĭue dates can be estimated using a number of different methods, including the last menstrual period, ultrasound, conception date, and IVF transfer date. While the due date is often estimated as a single date, it can be helpful to consider a range of due dates, since only 4% of births occur on the estimated due date. The due date, also known as the estimated date of confinement, is an estimation of when a pregnant woman will deliver her baby. Related Pregnancy Calculator | Pregnancy Weight Gain Calculator Estimation of due date While you’re at it, be sure to check out these other essential pregnancy and conception calculators. After all, 40 weeks of pregnancy can seem a little long at times. If nothing else, they can also be a fun way to pass the time. If you’re not exactly sure when your baby was conceived, playing with these online calculators can sometimes be enlightening.
Due date calculator conception free#
These conception date calculators are both free and easy to use. Every conception date calculator I’ve seen is based on one of these pieces of information. If you don’t know the date of your last period and you don’t know your due date, you’re not going to be able to use an online calculator to estimate your conception date. Most online calculators use a default of 28 days unless you manually change it yourself. It’s even better if you also know the average length of your menstrual cycle. If you don’t know your due date, you can still calculate when you conceived using these calculators as long as you know the date your most recent period began. (As always, remember these calculators only provide an estimate, not necessarily the exact date.) At first glance, it doesn’t look like a conception date calculator, but if you use the drop-down menu and select “I know my due date,” it will be.Įnter your due date and click “See my timeline.” At that point, it will take you to a complete breakdown of your entire pregnancy, including the date you conceived. Looking for a conception date calculator with a little more detail?Īnother helpful calculator to figure out when you conceived is from Baby Center. This calculator tries to educate users with a detailed explanation of pregnancy dating and conception calculating right there on the page. Many women don’t discover this until their first prenatal appointment when their OB tells them they’re two weeks further along than they expected. Dating pregnancies is a little wonky because you’re considered two weeks pregnant when you ovulate - before you’ve even conceived. What I really like about this particular conception date calculator is the explanation it offers beneath the calculator. All you have to do is enter your due date and voila! Out spits your (estimated) conception date. (If that’s the case, you’ll definitely also want to check out these ovulation calculators to make sure you know your fertile window.) Often, a simple conception date calculator is bestĬ has a very simple conception calculator. Simply choose your preferred due date and work backward. Of course, if you’re just a Type-A super-planner, you can also use these conception date calculators to plan your ideal time to get pregnant in the future. In that case, the answer to “ When did I get pregnant?” is pretty important. You may even want to know the conception date so you can be more certain about paternity. ( Was I already pregnant when I drank those margaritas? Was I pregnant when I used that medication?) You may be concerned about exposure to a particular substance. You’ll most likely want to be certain your due date is as accurate as possible. This can be helpful for a variety of reasons. You can use these conception date calculators to figure out when you conceived.
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