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IVF due date calculator
Calculate your IVF due date using your embryo transfer date and learn about important milestones in your pregnancy journey.
Please note that Flo Health does not collect, process, or store the data that you enter while using the Tools. All calculations are done exclusively in your browser. Flo Health does not have access to the results. All data will be permanently erased after leaving or closing the page.
At 1 week pregnant, you’re actually not pregnant yet. As your pregnancy is calculated from the first day of your last menstruation, your baby does not yet exist, and your body is preparing for the ovulation during which you’ll get pregnant.
At 2 weeks pregnant, you’re technically not pregnant yet. Right now there is a lone egg and a whole bunch of anxious sperm eager to fertilize the egg. Your uterus and the entire body are preparing for a big day of ovulation - the stage when you'll get pregnant.
Week 3 of pregnancy is the week when the implantation happens. Your body releases chorionic gonadotropin (hCG), which causes an increased production of estrogen and progesterone, and prevents new eggs in the ovaries from ripening. Very soon you'll start experiencing the first symptoms of pregnancy: missed period, nausea, breast changes.
At 4 weeks pregnant, your future baby has finally found his home for the next eight months. The blastocyst has arrived from a fallopian tube to your uterus. You can get a positive pregnancy test result at this stage.
By week 5, you should have missed your period, which is one of the most obvious signs you're expecting. Under the influence of hormonal changes, you can feel the first signs of pregnancy: breast swelling, fatigue, headache, and back pain.
Starting from pregnancy week 6, you may experience morning sickness. This is the result of hormonal changes occurring in your body. Malaise, breast swelling, darkening of the nipple areola, and frequent urination can bother you, too. In case of bleeding, you should consult your doctor.
At 7 weeks pregnant, symptoms start kicking in and your uterus almost doubles in size. Be prepared for a possible increase in nausea, fatigue, heartburn, and other pregnancy symptoms. Morning sickness may give a lot of trouble. Try to find some ways to cope with it.
At 8 weeks pregnant, you need to plan your first visit to the gynecologist. The doctor will prescribe the necessary tests and examinations for the first trimester of pregnancy. You may feel the growing discomfort of morning sickness. Try to be patient; it usually lasts until the 14th week only.
At 9 weeks pregnant, your baby is already about 0.6–0.7 in (16–18 mm) and weighs about 0.11 oz (3 g). The tail has disappeared; human features are becoming more distinct. The joints of his/her hands and legs can flex; the nipples and hair follicles are developing. Taste buds are beginning to form on the tongue, as well as primary tooth buds in the gums.
Week 10 of pregnancy is the time when almost all vital organs and tissues of your baby have formed. Now, they are beginning to function and grow rapidly. He or she can swallow amniotic fluid and move their arms and legs. The skin is getting covered with small hair and the fingers have tiny nails. Testes in boys already start to produce testosterone.
At 11 weeks pregnant, your baby has already reached 2 in (5 cm) in size. Now, his/her head is half the length of the body, but in the coming weeks, the body will grow enough to make up for it. The fetus skin is so thin and translucent that through it you can see an extensive network of vessels. Placental vessels are expanding to provide the fetus with necessary nutrients and oxygen.
At 12 weeks pregnant, your baby weighs about 0.49 oz (14 g). His/her vocal cords are forming, and kidneys are starting to produce urine, filling the bladder. Although you cannot feel it yet, you can see the baby during a sonogram screening (ultrasound).
Welcome to the last week of the first trimester! Most early pregnancy symptoms will soon be left behind. At 13 weeks pregnant, your baby is constantly growing. Now, he/she is more than 2.8 in (7 cm) from the top of his/her head to the coccyx.
At 14 weeks pregnant, your baby is developing rapidly. In a while, you will be able to feel them moving and kicking. Your body starts actively gaining weight. This occurs due to an increase in blood and lymph volume.
At 15 weeks pregnant, your baby is actively drawing in amniotic fluid through his/her nose. Very soon you'll start looking pregnant indeed as your uterus has risen from your pelvic region to your lower abdomen. Time to plan pregnancy shopping!
You’re on week 16 of your pregnancy, and things are really starting to gear up! Your tiny baby is not so tiny anymore, and it most definitely looks like a human baby now. By week 16 of your pregnancy, you’re 4 months in. That means you’re nearly halfway there and only have 5 more months to go!
If you’ve been enjoying a relatively subtle pregnancy with very little belly to show for it, that’s probably over now! Your waist will gradually disappear as your uterus moves upwards and out of your pelvis.
If you’ve been astonished by your baby’s rapid growth and weight gain over the last few weeks, by week 18 this will start to level off a little — but there’s still lots of big news in your little one’s early life! At this stage, he or she can yawn, stretch, and even make facial expressions like frowning. The baby’s sense of taste is developing, and taste buds can now distinguish between sweet and bitter.
At 19 weeks pregnant, your rounded belly is very noticeable. The first hair appears on the baby's head, and the brain areas responsible for the senses — tactile, gustatory, olfactory, visual and auditory — are developing rapidly.
Congratulations! You are halfway to meeting your baby. The baby's legs have almost straightened, so from now on, he/she will be measured from head to toe.
As a 21 week pregnant woman, you have crossed the halfway line on your journey to becoming a mother. Your baby is getting bigger. You can now definitely feel her presence as she explores the real estate that you’ve prepared for her.
If you are entering the 22nd week of your pregnancy, without doubts it is getting crowded in there! Your baby is growing and invading your space. And your uterus stretches to about 2 cm (0.8 in) above your belly button to fit your growing baby.
For many women, being 23 weeks pregnant is an exciting time because you may finally be showing your baby bump! Among other things, your baby’s eyes and lips are taking shape. They will begin to gain weight more weight which will eventually fill out their wrinkly skin.
At 24 weeks pregnant, your baby is almost a foot long. You could be experiencing a tingling sensation in your joints, which is known as carpal tunnel syndrome. It is a common condition during pregnancy which occurs due to fluid build-up in your joints which results in compression of the median nerve.
Once you reach week 25 of your pregnancy, you’ll be nearing the end of your second trimester. It can feel like times flies! At 25 weeks pregnant, you’re approximately 5 months and 2 weeks along. Your baby has been growing steadily and even though it’s still not ready, it won’t be long before it comes into the world.
You’re likely to put on between 16 and 22 pounds by now. At one point during this week, your baby will open his or her eyes for the first time. He or she is not yet able to see anything inside of the uterus but will blink closing and opening his or her eyes when falling asleep and waking up.
The 27th week of the pregnancy marks the final two weeks of the second trimester. If your baby is more active at night you might suffer from insomnia and have trouble sleeping. Compensate for the lack of sleep time during the night by napping during the day more when the baby is sleeping.
At 28 weeks you are now entering the third trimester of your pregnancy. At this stage, your baby is pretty well-developed. Her organs, tissues, and nerves continue to grow, but she already has all of the systems necessary for survival outside the uterus. Towards the end of the pregnancy, babies start to recognize familiar sounds and voices.
At 29 weeks pregnant, you're likely to develop varicose veins like 40 percent of expectant moms. It's also a good time to start doing a kick count. Let your doctor or midwife know if you notice that your baby is becoming less active.
At 30 weeks pregnant, you are likely to experience shortness of breath. Your baby is still up high near your rib and is waiting a bit – it is soon expected to drop down into your pelvis.
At 31 weeks pregnant, your breasts can get leaky producing the first baby’s food – colostrum. This is one of the symptoms that your body is getting ready for the big day. You are likely to experience shortness of breath. This week your baby is going through major nerve and brain development.
At 32 weeks pregnant, your body may start flexing its muscles preparing for the big day. Your baby is also preparing for her debut mastering the skills she’ll need to thrive outside your womb: swallowing, breathing, sucking.
At 33 weeks pregnant, you may notice that your baby’s movements are affected by your daily routine. Your belly continues to grow and it’s getting even more troublesome to find a comfortable sitting or sleeping position.
At 34 weeks pregnant, your breasts could start leaking small amounts of yellowish colostrum. Your baby is already the size of a school bag and weighs as a melon. If you’re worried about your safety at work, time to talk to your employer about maternity benefits.
At 35 weeks pregnant, you may know how your baby’s moving in your womb just by looking at your bump. It can you give you some discomfort and make you a bit breathless. At this point, many moms can’t wait for the baby to get here, while others are feeling a bit anxious about giving birth. Both feelings are completely normal!
At 36 weeks pregnant, your baby is sleeping between 60 and 80% of the time. It has finally moved into your pelvic cavity, the pressure on your diaphragm is released, and lightening happens. Your baby can now open its eyes, suck its thumb, breathe, and recognize voices!
Welcome to your 37th week of pregnancy, and congratulations! The baby moves further into the pelvis. It is considered to be ‘at-term’ and can actually arrive any day now. Make sure you are ready for the arrival of a new family member.
At 38 weeks pregnant, you can find yourself spending the whole life peeing. The pressure on your bladder is tremendous. Your baby is a fully functioning little human and your placenta is fully grown.
Welcome to the week 39 of pregnancy! Your baby is full term, meaning that it is fully developed and is only waiting for the right time to make an entrance into the world. Have you prepared everything that is needed to welcome your baby?
At 40 weeks pregnant, you may feel disappointed that your due date has come and gone. Don’t panic and make the last preparations for a new human who’ll soon join the world.
At week 41 of pregnancy, you might be dying out of the desire to give birth and see your baby. But rest assured that plenty of moms-to-be go past their due date and everything turns out just fine.
When a pregnancy lasts for 42 weeks or more it is referred to as a post-term pregnancy. While not many studies exist that prove why some women’s pregnancy lasts for 42 weeks, medical experts believe that factors such as hormones, genetics, and even obesity can be the cause.
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If your pregnancy test just came back positive following in vitro fertilization (IVF) treatment, congratulations! From ovarian reserve testing to egg retrieval and the nail-biting two-week wait, the IVF journey can be a real roller coaster, so this exciting news might feel like it’s been a long time coming.
Once your pregnancy news has sunk in, you’ll no doubt be eager to find out when your baby is due to arrive. You can work out when your baby is most likely to be born — also known as your estimated due date (EDD) — by using some basic information about your cycle. And since your exact transfer date is known, an IVF due date is generally more precise. So, you can find out how far along your pregnancy is with some accuracy and then start figuring out how your baby (and body) might change week by week.
Try using our IVF due date calculator now (you can find it above) and then scroll down for everything you need to know about estimated due dates and how Flo’s calculator works based on your IVF type.
Keep in mind that your due date is an estimate and not a guaranteed birthday. Only 4% of women give birth on their exact due date, and it’s perfectly normal for babies to arrive anywhere between 37 and 41 weeks of pregnancy.
That said, knowing how far along you are in your pregnancy is important for several reasons. Tracking your baby’s development can help you work out what to expect at every stage during the wild and wonderful journey toward parenthood. Plus, your little one will hit lots of important milestones before their delivery date, so it gives your health care provider essential information they need to monitor the health of your growing baby, too.
Key takeaways
- Calculating your IVF due date is generally more accurate than estimating a spontaneous conception due date because you know your embryo transfer date.
- Your baby’s due date is an estimate and not a guaranteed birthday — only 4% of babies arrive on their exact due date.
- IVF pregnancies have a slightly higher risk of complications, but your health care team will take good care of you, so try not to worry.
- Flo Premium’s pregnancy mode can help you and your partner (using Flo for Partners) learn about all the milestones you’ll reach in the journey to that all-important due date.
How do you calculate your due date with IVF?
If you’ve just landed on this IVF due date calculator, you might already be familiar with the IVF process and know exactly when your embryo was inserted into your uterus (aka embryo transfer). This is the key piece of information you’ll need to figure out your due date. However, as obstetrician and gynecologist Dr. Renita White, US, explains, the type of IVF you have can affect your due date slightly.
Here’s why: Most embryo transfers happen either three or five days after egg retrieval (when eggs are taken from your ovaries) and fertilization (when the eggs are mixed with sperm). If you become pregnant, your due date depends “on the age of the embryo at the time of transfer,” says Dr. White. She adds: “The age of the embryo is determined by the number of days after fertilization takes place. So an embryo that is three days old will have a different due date than an embryo that is five days old.” Your clinic will be able to give you this information.
In the IVF due date calculator above, you can insert the date of your embryo transfer as well as the age of the embryo at the time of transfer, and this should give you an accurate prediction of when your baby might be due.
You might also be wondering if it makes any difference whether you use a frozen embryo (known as frozen embryo transfer, or FET) or a fresh (unfrozen) embryo in your IVF. Whichever one you choose won’t impact your due date, says Dr. White.
How accurate are IVF due dates?
Due dates for non-IVF pregnancies (known as spontaneous pregnancies) are most commonly predicted by using the date of your last menstrual period (LMP). However, this is really just an informed guess. “Using the last menstrual period helps to guess when ovulation likely happened, but the exact timing of ovulation and fertilization can only be [estimated],” Dr. White explains.
IVF due date estimations, on the other hand, are generally more accurate because you know exactly when fertilization occurred. “Due dates [for IVF babies] are calculated based on the date of the embryo transfer,” says Dr. White. “IVF allows for control of the fertilization process, so this timing can be known, [and it gives] the most specific estimated due date.”
Although you can be confident of your due date’s accuracy with an IVF pregnancy, you should still think of it as a window of time in which you are most likely to go into labor rather than a guaranteed birth day.
“Whether a due date is based on the embryo transfer date (in the case of IVF) or last menstrual period (for spontaneous pregnancies), these are all estimates,” reminds Dr. White. “Babies may arrive slightly sooner or later.”
While it’s impossible to know exactly when your baby will arrive, it’s still worth tracking your pregnancy time line. “This is important because the due date is also used to estimate fetal weight and size,” explains Dr. White. “It can help determine if a baby is growing too small or large for their gestational age. It can also determine if a baby is preterm or full term at the time of delivery. This is important for determining whether a baby may need extra intervention by a pediatric doctor at birth.”
All of this might sound overwhelming, but remember, every pregnancy is different, and you have your prenatal team on hand to support you throughout your pregnancy.
Are IVF babies usually early or late?
You may have heard that IVF babies are more likely to be born prematurely, but this isn’t always the case. “They can be either early or late, just like babies who are conceived spontaneously,” says Dr. White.
The idea that IVF babies are more likely to be premature could be due to the increased chance of having multiple babies in an IVF pregnancy. In IVF cycles, sometimes they’ll put more than one embryo into your uterus (called a multiple embryo transfer) to increase the chance of the fertility treatment working. This can result in twins or triplets, who do tend to arrive early. The number of embryos placed in your uterus depends on your age, the number of eggs collected, and where you live, as some countries limit the number of embryos that can be transferred.
IVF pregnancies with a single fetus don’t tend to come with a higher chance of preterm birth unless there are other risk factors involved that are linked to prematurity. These include your age, your general health, complications of pregnancy, a history of premature birth, and the number of babies you’re carrying. Try not to think too much about these factors unless your doctor has advised you that you’re at higher risk. In that case, they will share everything you need to know and will be monitoring you carefully.
Do IVF babies need to be induced?
IVF pregnancies have a slightly increased risk of complications compared to spontaneously conceived babies, says Dr. White. That means if you conceive by IVF, you may be monitored more closely, and your health care provider might ask you to have a few more tests or scans. For example, you might get “an extra ultrasound study of the fetal heart around 20 to 22 weeks and additional testing around 36 weeks,” explains Dr. White.
It’s normal to undergo tests during your pregnancy to ensure that everything is running smoothly, so try not to worry. Rest assured, if you do need to be monitored in the hospital, you’ll be in safe hands. Talk to your doctor if you’re concerned about anything.
There’s a chance your health care team may suggest you’re induced toward the end of your pregnancy to be on the safe side. This isn’t the case with every IVF pregnancy, however. Induction of labor — which involves using synthetic hormones or manual methods to bring on labor before it happens naturally — can be done in a number of ways. If your doctor recommends induction, try to be positive — you can absolutely still have a labor where you feel in control, and everything will be done with your permission in the best interests of you and your baby.
Do IVF pregnancy symptoms start at the same time as normal pregnancies?
As you may know from personal experience, one of the most challenging aspects of the IVF journey can be the waiting game. From your initial consultation to the embryo transfer and then the pregnancy test, the entire process has a number of stages. It may have taken weeks, months, or even years for you to see that positive result, and it may have come with a range of emotions for you to work through, too.
Now that you’re pregnant, you may be waiting for some symptoms to show up. So when can you expect to start noticing them in an IVF pregnancy? Just like all pregnancies, everyone experiences them differently. “Early pregnancy symptoms, such as nausea, fatigue, and breast tenderness, typically start between 6 and 8 weeks of pregnancy,” explains Dr. White. “However, this can vary. Some people get no bothersome symptoms, while others may get symptoms before a missed period.”
You might find that within the first few weeks of pregnancy, you’re already using Flo’s Pregnancy Mode to track regular symptoms, noticing new, weird, and wonderful changes every day. On the other hand, you might not be feeling much physical difference at all. Whichever one rings true for you, try not to compare yourself to others. The journey to becoming a parent requires accepting that things are often outside of our control, so go easy on yourself. And if you have any concerns, reach out to your doctor — there’s no such thing as a silly question.
Try some of Flo's other online tools, including our due date calculator (for non-IVF pregnancies), hCG calculator, our pregnancy test calculator, and our period calculator.
References
Centers for Disease Control and Prevention, American Society for Reproductive Medicine, Society for Assisted Reproductive Technology. 2014 Assisted Reproductive Technology National Summary Report. US Department of Health and Human Services, 2016, ftp.cdc.gov/pub/publications/art/ART-2014-National-Summary-Report.pdf.
Choe, Jennifer, and Anthony Shanks. “In Vitro Fertilization.” StatPearls, StatPearls Publishing, 4 Sep. 2023, www.ncbi.nlm.nih.gov/books/NBK562266/.
“Definition of Term Pregnancy. Committee Opinion No. 579. American College of Obstetricians and Gynecologists.” Obstetrics and Gynecology, vol. 122, no. 579, Nov. 2013, pp. 1139–40, www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2013/11/definition-of-term-pregnancy.
“Guidance on the Limits to the Number of Embryos to Transfer: A Committee Opinion (2021).” American Society for Reproductive Medicine, www.asrm.org/practice-guidance/practice-committee-documents/guidance-on-the-limits-to-the-number-of-embryos-to-transfer-a---committee-opinion-2021/. Accessed 5 July 2024.
“In Vitro Fertilization (IVF).” Mayo Clinic, 1 Sep. 2023, www.mayoclinic.org/tests-procedures/in-vitro-fertilization/about/pac-20384716.
“Labor Induction.” Mayo Clinic, 28 June 2024, www.mayoclinic.org/tests-procedures/labor-induction/about/pac-20385141.
Martin, Joyce, and Michelle Osterman. “Shifts in the Distribution of Births by Gestational Age, United States, 2014-2022.” National Vital Statistics Reports, vol. 73, no. 1, 31 Jan. 2024, https://doi.org10.15620/cdc:135610.
“Methods for Estimating the Due Date. Committee Opinion No. 700. American College of Obstetricians and Gynecologists.” Obstetrics and Gynecology, vol. 129, no. 700, May 2017, pp. e150–54, www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2017/05/methods-for-estimating-the-due-date.
Reimundo, Pilar, et al. “Single-Embryo Transfer: A Key Strategy to Reduce the Risk for Multiple Pregnancy in Assisted Human Reproduction.” Advances in Laboratory Medicine, vol. 2, no. 2, May 2021, pp. 179–98, doi:10.1515/almed-2021-0013.
“Single Embryo Transfer.” CDC Assisted Reproductive Technology, www.cdc.gov/art/patientresources/transfer.html. Accessed 5 July 2024.
The Society for Maternal-Fetal Medicine (SMFM), and Alessandro Ghidini. “SMFM Consult Series #60: Management of Pregnancies Resulting from IVF.” Contemporary OB/GYN, 1 Apr. 2022, www.contemporaryobgyn.net/view/smfm-consult-series-60-management-of-pregnancies-resulting-from-ivf.