Due Date Calculator In Pregnancy

The best way to formally get an idea of when your baby will be born is to calculate the due date of your pregnancy. To determine approximately when you will give birth, count backwards from the first day of your most recent period by forty weeks, which is equivalent to 280 days. To what extent is this accurate? In most cases, it is regarded as being of high quality.

Did you know that starting from your LMP and counting forward 40 weeks (280 days) is the most accurate way to determine when your due date will be? Our due date calculator removes all element of uncertainty regarding the calculation of this significant number. Simply enter the first day of your most recent period into our calculator, and it will figure out the rest for you. If you don’t already know, it will even give you an estimated range for when your payment is due.

If you want to use our due date calculator, the first thing you’ll need to do is determine the date of your most recent menstrual period. You can do this by consulting the calendar for your most recent period or by looking through the archives. After you have added three months to the date of your most recent period, you will need to add another seven days in order to account for the possibility that you may have become pregnant on a day other than the day your period ended.

How Soon Can I Take a Pregnancy Test?

A missed menstruation cycle is one of the earliest signs of pregnancy. That’s why we usually recommend waiting until you’ve missed your period before taking a pregnancy test. You can purchase low cost, high quality pregnancy tests here. If you can’t wait that long and you know the day of your last period we can calculate possible conception and your pregnancy due date.

Did You Get a Positive Test? Here’s What to do Next.

If you would like to speak to someone about your pregnancy, click the Chat now button below or call us toll-free at 1-800-672-2296. You can also explore our numerous articles about how to have a healthy pregnancy.

BabyCenter’s due date calculator

Use this calculator by plugging in either the date of your last menstrual cycle or the date of conception. That’s it! The pregnancy calculator will do the rest!

How is my due date calculated?

There are a few different approaches. If you happen to know the day you conceived, you can count forward 38 weeks from that day to determine when you will be expecting your child. (The average duration of a human pregnancy is approximately 38 weeks.)

However, only a small percentage of expectant mothers are aware of the exact date that they conceived. Even if you only had sexual activity once during your fertile period, there is no way you could get pregnant on that day unless you also happened to be ovulating at the same time. Within your fallopian tubes, sperm have the potential to survive for up to five days. Therefore, it is possible that it could be up to five days after you have sex before you release an egg (also known as ovulating) and it is fertilized by a sperm that has been waiting. That is the day that you become pregnant.

How, then, can anyone calculate an expected delivery date when they don’t even know when the egg was fertilized?

First day of your last period

The most common method for determining when you will give birth during your pregnancy is to count forward 40 weeks from the first day of your most recent menstrual period (LMP). And the majority of medical professionals operate in this manner.

If your menstrual cycle lasts for 28 days, which is the average length of a cycle, your period most likely began about two weeks before you conceived. This means that you are likely pregnant. This explains why the average duration of a pregnancy is considered to be 40 weeks rather than 38 weeks.

This method does not take into account the length of your actual menstrual cycle or the time of day that you believe you may have become pregnant. However, as a rule of thumb, ovulation occurs for most women approximately 14 days after the first day of their menstrual cycle. In addition, women are more likely to remember the first day of their most recent period than the day that they ovulated.

Conception date

If you do happen to know precisely when you conceived – say, if you were using an ovulation predictor kit or tracking your ovulation symptoms – you can calculate your pregnancy due date based on your conception date. Just choose that calculation method from the pulldown above and put in your date.

Note: Again, you don’t necessarily conceive on the day you have sex. But for a fun read, see our stories from parents who know when and where they did the deed that resulted in their child.

IVF transfer date

If you conceived your child through in vitro fertilization (IVF), you can figure out when your due date will be by using the date of your IVF transfer. If you had an embryo transfer on Day 5 of your pregnancy, count 261 days from the date of your transfer. Count 263 days after your procedure if you had an embryo transfer on Day 3.

Can my due date change?

If your baby is measured during an ultrasound scan in the first trimester and found to be much larger or smaller than expected for gestational age, your healthcare provider may revise the date that you were originally supposed to give birth. If you have an irregular menstrual cycle length, which makes it difficult to pinpoint the exact date that you became pregnant, then this is more likely to happen to you.

During the ultrasound exam, your healthcare provider will measure your baby in order to determine how far along your baby is and will then provide you with a new due date.

What if I already know my due date?

This pregnancy calendar can be viewed using this calculator if you already know when you are expecting your baby to arrive. It will tell you when various milestones will occur, such as when your baby’s heart will begin beating, as well as when you may be due for prenatal tests and other prenatal care. In addition to this, you will discover the zodiac sign and birthstone that most likely apply to your child, as well as notable individuals who were born on the day that you are expecting your child.

Check out the week-by-week pregnancy calendar on BabyCenter.com.

How likely am I to give birth on my due date?

Of course, a due date calculation is always approximate, whether it’s from our tool or from your doctor or midwife. Only 1 in 20 women delivers on her due date. You’re just as likely to go into labor any day during the two weeks before or after.

Want more information about how the weeks, months, and trimesters of pregnancy are counted? See our pregnancy timing chart.

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