Pregnancy Due Date Calculator
Curious to know your due date?
Our easy-to-use pregnancy calculator is the most popular way to calculate your due date based on your last menstrual period.
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Pregnancy Due Date Calculator
The Pregnancy Calculator can estimate a pregnancy schedule based on the provided due date, last period date, ultrasound date, conception date, or IVF transfer date.
PREGNANCY CALCULATOR
Enter the date of the first day of your last menstrual period (LMP):
DUE DATE RESULT
Probable date of conception:
Foetal Age Today:
Best date range for NT scan:
(12 weeks 3 days to 13 weeks 3 days)
Morphology Scan Date:
(19 weeks)
First Heart Tones by Doppler:
(11 to 12 weeks)
Best time to evaluate cervical length in patient with risk factors:
Best time for routine anatomy ultrasound:
(18 to 20 weeks)
Estimated Due Date:
What is an estimated due date during pregnancy?
Your due date is when the doctors think your baby might be born. It’s not a strict deadline, though. Only a few babies arrive exactly on that day. You can use our Due Date Calculator to estimate when your baby might arrive based on your last period, conception date, IVF transfer date, or ultrasound timing.
But remember, Your baby’s due date is just an estimate, not a deadline. Only around 4 percent of babies are born on that exact date.
First day of last period
Pregnancies usually last about 40 weeks, which is roughly 9 months. To figure out when your baby is due, the common method is to count 40 weeks or 280 days from the first day of your last period. You can also subtract three months from the first day of your last period and then add seven days. Another option is to select “last period” from the Due Date Calculator menu.
Healthcare providers often use the first day of your last period to estimate your baby’s due date.
IVF transfer date
Congratulations on embarking on your journey to parenthood through in vitro fertilization (IVF)! Now that you’re expecting, it’s natural to want to know your due date so you can start planning for your new arrival. Calculating your due date after IVF is slightly different from traditional pregnancies, but it’s not complicated. Let’s break it down into easy steps:
Step 1: Know Your Transfer Date The first thing you need to know is the date of your embryo transfer. This is the day when the fertilized egg (embryo) is placed into your uterus.
Step 2: Determine the Type of Transfer Embryo transfers typically happen either three days or five days after the egg retrieval and fertilization process. Knowing which type of transfer you had will help you calculate your due date accurately.
- If you had a day-three transfer, count 263 days from the transfer date.
- If you had a day-five transfer, count 261 days from the transfer date.
Step 3: Use the Due Date Calculator You can use our Due Date Calculator and select “IVF” to get an estimated due date based on your transfer date.
That’s it! By following these simple steps, you can calculate your due date after IVF and start preparing for the arrival of your little one. Remember, every pregnancy journey is unique, so don’t hesitate to reach out to your healthcare provider if you have any questions or concerns along the way. Wishing you a healthy and smooth pregnancy journey ahead!
Ultrasound scan
If you’re unsure about the exact timing of your pregnancy, don’t worry. There are ways to figure it out accurately, even if you can’t remember your last period or when you might have conceived.
One helpful tool is an early ultrasound. This scan, which you might have during your first prenatal visit or sometime in the first trimester, can provide a more precise estimate of your due date compared to other methods like tracking your menstrual cycle. You can select “ultrasound” from our Due Date Calculator options to get started.
It’s important to note that not all pregnant women receive an early ultrasound. Some healthcare providers routinely offer them, while others recommend it based on factors like irregular periods, being 35 or older, previous pregnancy complications, or challenges determining the due date through other means.
There are other signs that can also help your healthcare provider determine how far along you are in your pregnancy and pinpoint your due date during your prenatal check-ups.
By considering these factors and utilizing tools like early ultrasounds, healthcare providers can better support pregnant individuals by accurately determining due dates and providing appropriate care throughout pregnancy.
- For instance, hearing your baby’s heartbeat for the first time (usually around week 9 or 10) or feeling fetal movements (typically between 18 and 22 weeks) can offer valuable clues.
- During your prenatal visits, your healthcare provider will also measure your fundal height, which is the distance from your pubic bone to the top of your uterus. This measurement helps confirm your due date.
- Additionally, the size of your uterus, assessed during your initial internal pregnancy exam, can provide further insight into your estimated due date.
By considering these factors and utilizing tools like early ultrasounds, healthcare providers can better support pregnant individuals by accurately determining due dates and providing appropriate care throughout pregnancy.
Can I plan my due date?
Can my Pregnancy due date change?
Irregular Periods: If your menstrual cycle isn’t regular, it can make it tricky to accurately determine your due date initially. So, your doctor might tweak it based on further assessments.
Timing of Ultrasound: Sometimes, if your first ultrasound happens later in your pregnancy, it might provide different information than an early one, leading to a revised due date.
Abnormal Fundal Height: Fundal height, which measures the size of your uterus, might deviate from the norm, prompting your doctor to reassess your due date.
Alpha-fetoprotein (AFP) Levels: AFP, a protein produced by your baby, might fall outside the expected range, prompting further evaluation and potential adjustments to your due date.
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