Now, he/she is more than 2.8 in (7 cm) from the top of his/her head to the coccyx. Your baby can now open its eyes, suck its thumb, breathe, and recognize voices! Content that appears under this byline was created by members of the BabyCenter Editorial team. Youll also get an analysis of how your baby is changing inside of you. If you conceived throughIVF, you can calculate your due date using your IVF transfer date. Use our pregnancy calculator below to learn more about the change in your body and the development of your baby during your pregnancy. Under normal circumstances, babies born within any of these ranges can be healthy, though full-term babies generally have better outcomes.2 Babies born before 37 weeks are considered preterm, or premature, while those born after 42 weeks are postterm. Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). It all depends on the perspective of the woman charting her own ovulation. So, how does it work? 9th Wed = February 3, 2024 = 9 Weeks. Use our pregnancy due date calculator by plugging in either the date of your last menstrual cycle or the date you know you conceived. 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. Be sure to talk to your health care provider about your due date. After 14 weeks this is no longer possible because every baby grows differently. At-home urine tests measure the amount of hCG (human chorionic gonadotropin) present in your body. Please whitelist our site to get all the best deals and offers from our partners. So just know that twins may arrive earlier than the due date noted by the pregnancy calculator. So while you might want to plan to have a baby in a certain month, all you can really do is try. That means she's dreaming. Parikhs rule is another theory that lacks scientific evidence to back it up, so medical practitioners dont commonly use it to calculate due date either. At 7 weeks pregnant, your baby is the size of a blueberry. The due date tells you when you expect to give birth to your baby. The due date can also be calculated at the 12/13/14 week term ultrasound on the basis of the head circumference and the length of the baby. In short, use this formula: Woods method considers the individual length of the menstrual cycle, as well as the number of pregnancies a person has experienced. In about 40% of pregnant women, the add 280 days to the first day of the last menstrual period method is not reliable. ", So that means you count pregnancy from your LMP, not the date you conceived, adding an extra two weeks even though you werent technically pregnant then. Its so unusual for the due date to change after your first ultrasound scan because knowing the gestational age holds a lot of importance in monitoring the health of a pregnancy. If you do happen to know precisely when you conceived say, if you were using anovulation predictor kit or tracking your ovulation symptoms you can calculate your pregnancy due date based on your conception date. Some people like to be organized, and theres nothing wrong with that. 168, no. our editorial and medical review policies, 8 Ovulation Symptoms to Detect Your Most Fertile Days. (Human gestation takes about 38 weeks.). Your belly continues to grow and its getting even more troublesome to find a comfortable sitting or sleeping position. If your cycle lasts longer, the estimated due date will likely be later. Remember that this website is not designed to take the place of medical professionals. Believe it or not, you can start detecting your pregnancy around the time your first miss your period, or even two weeks after that. You need to give your body some time, as it may take a short while for your body to go back to its , Could you be pregnant and not even know it? Keep in mind, only a small percentage of women delive , Congratulation, you are officially full-term! 2005-2023Everyday Health, Inc., a Ziff Davis company. That means you can still get pregnant several days after youve had unprotected sex. Your baby is growing and invading your space. The doctor will prescribe the necessary tests and examinations for the first trimester of pregnancy. "@type": "MedicalWebPage", On ultrasound, I would measure the length of the fetus, called the crownrump length, in the first trimester to get the gestational age or due date. A pregnancy wheel or gestation calculator is a simple calendar that works out your EDD or babys birth date based on different inputs, such as your LMP. At 5 weeks pregnant, your baby is the size of a sesame seed. BBC, February 3, 2015. www.bbc.com/news/magazine-31046144. This explains why pregnancies are said to last 40 weeks instead of 38 weeks. T , You may be starting to get used to the idea of being pregnant or you may still be in a sta , Congratulations! The date of your ovulation depends on the length of your cycle.
Due Date Calculator Week By Week - CALCULATORSA 2022. However, hyperemesis gravidarum is much more rare form of pregnancy nausea and vomiting that can occur during pregnancy. Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. The most popular health & wellbeing app co-created with 100+ leading health & medical experts, and acclaimed medical institutions. ga('send', 'pageview'); m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) Week 14 of pregnancy marks the , At 13 weeks, you are in your last week of your first trimester. Its rare for a baby to be born exactly on their due date [only around 4% of babies are]. Your baby is due: Oct 08 2773 weeks pregnant Estimated Date of Conception: Jan 15, 1970 (2773 weeks 2 days or 693 months) Estimated Date of Conception: Dec 03, 2021. However, its worth noting that none of the following are currently used by health care providers to work out the due date, as theres a lack of scientific evidence behind them.
Pregnancy Countdown Calculator | babyMed.com 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. Copyright document.write(new Date().getFullYear()); American Pregnancy Association Web Design by Edesen, From first day of your period to the first day of your next period.
Calculate 40 weeks from date | Math Index Weekly Count: Follow new developments in weeks and days. The idea goes, however, that it can help predict due date in those who have irregular cycles. At 41 weeks pregnant, your baby is the size of a pumpkin. How to calculate due date for multiples is the same method youd use for a singleton baby, but keep in mind that delivery day recommendations may change: For example, di/di twins are usually delivered between 38 weeks and 38 weeks and six days instead of 40 weeks. "logo": { And thats useful for having a rough idea of when your baby will arrive, but its worth noting that this should be confirmed by your health care provider. This educational content is not medical or diagnostic advice. Week 41. Choose your week and read detailed informations about your pregnancy. Week 3 of pregnancy is the week when the implantation happens. Estimating due date based on ultrasound involves the use of soundwaves to look inside the body and compare the growth of the fetus to typical growth rates of babies around the world. Your complete pregnancy guide to every week of your pregnancy. For a day three embryo, count forward 263 days from the transfer for your due date; for a day five embryo, add 261 days. By week 5, you should have missed your period, which is one of the most obvious sign you're expecting. Accessed 13 July 2022. The second milestone is 28 weeks , when viability skyrockets. When using in vitro fertilization, the estimation of the due date is generally more precise than calculating the due date based on natural conception, since the exact transfer date is known. Luckily, our Due Date Calculator can help. Pregnancy Calculator - Calculate Due Date - Week by Week Pregnancy Pregnancy Due Date Calculator Use our pregnancy calculator below to learn more about the change in your body and the development of your baby during your pregnancy. All rights reserved. If you know that youre pregnant, you probably want to be the first to know when your baby is going to be born. "description" : "Pregnancy due date calculator", Or choose "last period" from the choices in our Due Date Calculator menu, above. Towards the end of the pregnancy, babies start to recognize familiar sounds and voices. And your uterus stretches to about 2 cm (0.8 in) above your belly button to fit your growing baby. It will tell you when you'll hit various milestones, and when you may be due for prenatal tests and prenatal visits. We agreed on what month we were going to try. Do this using the following formulas. Our pregnancy Due Date Calculator (or estimated Due Date Calculator) can help. You may have nausea and fatigue. While nausea and vomiting can be very uncomfortable for pregnancy women, how can you tell when naus , Pregnancy is an exciting, yet nerve-wrecking time in your life.
Pregnancy Due Date Calculator - American Pregnancy Association Conception happens when your egg is fertilized, but since sperm can live inside your fallopian tubes for up to five days waiting for an egg to be released, you could conceive up to five days after having sex. They will use information about your last menstrual period, plus your first ultrasound, to work out your EDD, and once this has been calculated, its rare for your due date to change. American College of Obstetricians and Gynecologists Committee on Obstetric Practice. In a while, you will be able to feel them moving and kicking. "@context":"http:\/\/schema.org", ], (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), We believe you should always know the source of the information you're seeing. babyMed Monthly Pregnancy Calculator and Calendar. Home pregnancy tests: Can you trust the results? You are 168% of the way through your pregnancy. At 9 weeks pregnant, your baby is already about 0.60.7 in (1618 mm) and weighs about 0.11 oz (3 g). Very soon you'll start looking pregnant indeed as your uterus has risen from your pelvic region to your lower abdomen. Just enter your pregnancy due date or other information to create and calculate a personalized weekly and daily pregnancy calendar. Default = 28 Optional: Leave 28 if unsure. And the baby is the size of. However, the time of conception is often not known exactly. Find advice, support and good company (and some stuff just for fun). If you happen to know the exact day you conceived, you could calculate your baby due date by counting 38 weeks from the date of conception (38 weeks is said to be the length of human gestation). If youve had IVF, then your babys due date is calculated slightly differently, depending on: The good news is that IVF due dates are generally more accurate because youll know exactly when you had your embryo transfer or medically conceived, although no due date is 100% accurate. At 8 weeks pregnant, your baby is the size of a bean. Pregnancy Dating. StatPearls, StatPearls Publishing, 2021. Whats amazing about this photo is the position of the sister outside the glass. The approximate due date can be calculated by calculating the due date, using the conception date and ultrasound.
Pregnancy Due Date Calculator | BabyCenter Group Black's collective includes Essence, The Shade Room and Naturally Curly. The joints of his/her hands and legs can flex; the nipples and hair follicles are developing. How far along and how many weeks pregnant am I? 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!). Prep for baby's arrival with The Bump due date calculator. You have to push a baby out! . * Copyright 2014 David Bushell | BSD & MIT license | https://dbushell.com/ You were still on a contraceptive pill (up to 3 months ago), A menstrual cycle that is much longer or shorter than 28 days. Length of Human Pregnancy and Contributors to Its Natural Variation. Human Reproduction, vol. Even if you cant pinpoint when you conceived, forget the day of your last menstrual period, or arent sure when ovulation occurred, the date of an early ultrasound, if you have one, can help your practitioner determine your due date at your first prenatal appointmentor another prenatal visit in your first trimester. Just remember there is an amazing prize at , 37 weeks used to be considered a full-term pregnancy, but doctors now consider 39 weeks fu , Youre in the homestretch. 9 weeks pregnant .swiper-pagination{position:absolute;text-align:center;transition:opacity .3s;transform:translateZ(0);z-index:10}.swiper-pagination.swiper-pagination-hidden{opacity:0}.swiper-pagination-disabled>.swiper-pagination,.swiper-pagination.swiper-pagination-disabled{display:none!important}.swiper-horizontal>.swiper-pagination-bullets,.swiper-pagination-bullets.swiper-pagination-horizontal,.swiper-pagination-custom,.swiper-pagination-fraction{bottom:10px;left:0;width:100%}.swiper-pagination-bullets-dynamic{overflow:hidden;font-size:0}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet{transform:scale(.33);position:relative}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active,.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active-main{transform:scale(1)}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active-prev{transform:scale(.66)}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active-prev-prev{transform:scale(.33)}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active-next{transform:scale(.66)}.swiper-pagination-bullets-dynamic .swiper-pagination-bullet-active-next-next{transform:scale(.33)}.swiper-pagination-bullet{width:var(--swiper-pagination-bullet-width,var(--swiper-pagination-bullet-size,8px));height:var(--swiper-pagination-bullet-height,var(--swiper-pagination-bullet-size,8px));display:inline-block;border-radius:50%;background:var(--swiper-pagination-bullet-inactive-color,#000);opacity:var(--swiper-pagination-bullet-inactive-opacity,.2)}button.swiper-pagination-bullet{border:none;margin:0;padding:0;box-shadow:none;-webkit-appearance:none;appearance:none}.swiper-pagination-clickable .swiper-pagination-bullet{cursor:pointer}.swiper-pagination-bullet:only-child{display:none!important}.swiper-pagination-bullet-active{opacity:var(--swiper-pagination-bullet-opacity,1);background:var(--swiper-pagination-color,var(--swiper-theme-color))}.swiper-pagination-vertical.swiper-pagination-bullets,.swiper-vertical>.swiper-pagination-bullets{right:10px;top:50%;transform:translate3d(0,-50%,0)}.swiper-pagination-vertical.swiper-pagination-bullets .swiper-pagination-bullet,.swiper-vertical>.swiper-pagination-bullets .swiper-pagination-bullet{margin:var(--swiper-pagination-bullet-vertical-gap,6px) 0;display:block}.swiper-pagination-vertical.swiper-pagination-bullets.swiper-pagination-bullets-dynamic,.swiper-vertical>.swiper-pagination-bullets.swiper-pagination-bullets-dynamic{top:50%;transform:translateY(-50%);width:8px}.swiper-pagination-vertical.swiper-pagination-bullets.swiper-pagination-bullets-dynamic .swiper-pagination-bullet,.swiper-vertical>.swiper-pagination-bullets.swiper-pagination-bullets-dynamic .swiper-pagination-bullet{display:inline-block;transition:transform .2s,top .2s}.swiper-horizontal>.swiper-pagination-bullets .swiper-pagination-bullet,.swiper-pagination-horizontal.swiper-pagination-bullets .swiper-pagination-bullet{margin:0 var(--swiper-pagination-bullet-horizontal-gap,4px)}.swiper-horizontal>.swiper-pagination-bullets.swiper-pagination-bullets-dynamic,.swiper-pagination-horizontal.swiper-pagination-bullets.swiper-pagination-bullets-dynamic{left:50%;transform:translateX(-50%);white-space:nowrap}.swiper-horizontal>.swiper-pagination-bullets.swiper-pagination-bullets-dynamic .swiper-pagination-bullet,.swiper-pagination-horizontal.swiper-pagination-bullets.swiper-pagination-bullets-dynamic .swiper-pagination-bullet{transition:transform .2s,left .2s}.swiper-horizontal.swiper-rtl>.swiper-pagination-bullets-dynamic .swiper-pagination-bullet{transition:transform .2s,right .2s}.swiper-pagination-progressbar{background:rgba(0,0,0,.25);position:absolute}.swiper-pagination-progressbar .swiper-pagination-progressbar-fill{background:var(--swiper-pagination-color,var(--swiper-theme-color));position:absolute;left:0;top:0;width:100%;height:100%;transform:scale(0);transform-origin:left top}.swiper-rtl .swiper-pagination-progressbar .swiper-pagination-progressbar-fill{transform-origin:right top}.swiper-horizontal>.swiper-pagination-progressbar,.swiper-pagination-progressbar.swiper-pagination-horizontal,.swiper-pagination-progressbar.swiper-pagination-vertical.swiper-pagination-progressbar-opposite,.swiper-vertical>.swiper-pagination-progressbar.swiper-pagination-progressbar-opposite{width:100%;height:4px;left:0;top:0}.swiper-horizontal>.swiper-pagination-progressbar.swiper-pagination-progressbar-opposite,.swiper-pagination-progressbar.swiper-pagination-horizontal.swiper-pagination-progressbar-opposite,.swiper-pagination-progressbar.swiper-pagination-vertical,.swiper-vertical>.swiper-pagination-progressbar{width:4px;height:100%;left:0;top:0}.swiper-pagination-lock{display:none} @charset "UTF-8"; (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ If you conceived throughin vitro fertilization (IVF), you can calculate your due date using your IVF transfer date. The tail has disappeared; human features are becoming more distinct. Your healthcare provider might revise your due date if your baby is measured during a first trimester ultrasound scan and found to be much bigger or smaller than expected for gestational age. For our specific case, the calculation is: 11th September 2019 + 263 days = 31st May 2020 What's more, she also knows that today, 1 st October, she is exactly five weeks and one day pregnant.
Due Date Calculator | Woman's Hospital | Baton Rouge, LA } Allow me to introduce you to some of the wonderful winners of the 2018 child photography contest. Theres a lot that centers around it, so youre probably wondering how likely it is that youll give birth on your due date. This calculator is a general guide - every pregnancy is unique so consult with your doctor because some babies arrive sooner or later than expected. And even if you do manage to conceive at a time that gives you your ideal due date, remember that your EDD is just an estimate. Comparison of the First Trimester Ultrasound and Parikhs Formula in Determining the Expected Date of Delivery: A Prospective Study. BMC Pregnancy and Childbirth, vol. It also provides useful information that you have to know about your week of pregnancy. At 13 weeks pregnant, your baby is constantly growing. Dr. Amos Grunebaum, MD, FACOG is a Professor of Obstetrics and Gynecology, and among the world's leading authorities on fertility and pregnancy. For many women, ovulation is good because theyre excited about the idea of becoming pregnant, and theyre making sure they can figure out when the best time for them to engage in intercourse is going to occur during the month. Week 28 of your pregnancy is Jul 20, 2022 - Jul 26, 2022. Tracking ovulation is easier if women know what signs and symptoms to look for. "about": [ A first-trimester ultrasound is the most accurate way to calculate due date, and changes to the date after that measurement is done are extremely rare. At 4 weeks pregnant, your baby is the size of a poppy seed. However, youll also receive some interesting information that may surprise you. Remember that pregnancy due date calculators, birth date calculators, and pregnancy calculators can help you learn more about your estimated due date and pregnancy timeline, but they are not a replacement for medical advice. The accuracy of the due date depends on how early in the pregnancy it was calculated and how predictable your menstrual cycle is, Dr. Celestine explains. To work it out . "@id":"#website", But it can be quite tricky to plan a due date because there are so many factors at play with conception that you (and your partner) dont have control over. Babies come on their own schedule. In fact, nearly 60 percent of women start experiencing their pregnancy symptoms when theyre 6 weeks pregnant, even 90 percent of women experience them by the time theyre 8 weeks pregnant. Pregnancy Calendar and Due Date Calculator Calculate Based On: First Day of Last Menstrual Period * Average Length of Cycles From first day of your period to the first day of your next period. "name": "Dr. Barbara Levy", 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. The theories are as follows: One theory on how to calculate due date, also using LMP, is the Mittendorf-Williams rule. BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. Although you cannot feel it yet, you can see the baby during a sonogram screening (ultrasound). What to Expect supports Group Black and its mission to increase greater diversity in media voices and media ownership. At 42 weeks pregnant, your baby is the size of a watermelon. The due date, also known as the estimated date of confinement, is an estimation of when a pregnant woman will deliver her baby. Use this pregnancy due date calculator to find out when your baby is due. Your body has alread , Your first trimester is coming to an end, and you may be excited, exhausted or both. While the average pregnancy lasts 40 weeks from the day of the last menstrual period, it is normal for babies to come anywhere from 37 to 42 weeks, so its best not to focus too much on a specific due date. As this method is affected by the regularity of your menstrual cycle, the due date predictor is not 100% accurate. Ohio has been attempting to pass this bill since 2011 and has not yet succeeded. The timing of an early ultrasoundcan sometimes more accurately date the pregnancy than your LMP and other methods. is a week-by-week pregnancy calculator and calendar with information for each day of your pregnancy. /*! As we now know, the most commonly used method to calculate due date is to count 40 weeks from the first day of your LMP, Dr. Celestine says, adding that this is usually done at your first appointment. Time to plan pregnancy shopping!
Due Date Calculator: How Many Weeks Pregnant Are You? - Cleveland Clinic { When a pregnancy lasts for 42 weeks or more it is referred to as a post-term pregnancy. */.pika-single{z-index:9999;display:block;position:relative;color:#333;background:#fff;border:1px solid;border-color:#ccc #ccc #bbb;font-family:Helvetica Neue,Helvetica,Arial,sans-serif}.pika-single:after,.pika-single:before{content:" ";display:table}.pika-single:after{clear:both}.pika-single.is-hidden{display:none}.pika-single.is-bound{position:absolute;box-shadow:0 5px 15px -5px rgba(0,0,0,.5)}.pika-lendar{float:left;width:240px;margin:8px}.pika-title{position:relative;text-align:center}.pika-label{display:inline-block;position:relative;z-index:9999;overflow:hidden;margin:0;padding:5px 3px;font-size:14px;line-height:20px;font-weight:700;background-color:#fff}.pika-title select{cursor:pointer;position:absolute;z-index:9998;margin:0;left:0;top:5px;opacity:0}.pika-next,.pika-prev{display:block;cursor:pointer;position:relative;outline:none;border:0;padding:0;width:20px;height:30px;text-indent:20px;white-space:nowrap;overflow:hidden;background-color:transparent;background-position:50%;background-repeat:no-repeat;background-size:75% 75%;opacity:.5}.pika-next:hover,.pika-prev:hover{opacity:1}.is-rtl .pika-next,.pika-prev{float:left;background-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAUklEQVR42u3VMQoAIBADQf8Pgj+OD9hG2CtONJB2ymQkKe0HbwAP0xucDiQWARITIDEBEnMgMQ8S8+AqBIl6kKgHiXqQqAeJepBo/z38J/U0uAHlaBkBl9I4GwAAAABJRU5ErkJggg==")}.is-rtl .pika-prev,.pika-next{float:right;background-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAU0lEQVR42u3VOwoAMAgE0dwfAnNjU26bYkBCFGwfiL9VVWoO+BJ4Gf3gtsEKKoFBNTCoCAYVwaAiGNQGMUHMkjGbgjk2mIONuXo0nC8XnCf1JXgArVIZAQh5TKYAAAAASUVORK5CYII=")}.pika-next.is-disabled,.pika-prev.is-disabled{cursor:default;opacity:.2}.pika-select{display:inline-block}.pika-table{width:100%;border-collapse:collapse;border-spacing:0;border:0}.pika-table td,.pika-table th{width:14.285714285714286%;padding:0}.pika-table th{color:#999;font-size:12px;line-height:25px;font-weight:700;text-align:center}.pika-button{cursor:pointer;display:block;box-sizing:border-box;-moz-box-sizing:border-box;outline:none;border:0;margin:0;width:100%;padding:5px;color:#666;font-size:12px;line-height:15px;text-align:right;background:#f5f5f5;height:auto}.pika-week{font-size:11px;color:#999}.is-today .pika-button{color:#3af;font-weight:700}.has-event .pika-button,.is-selected .pika-button{color:#fff;font-weight:700;background:#3af;box-shadow:inset 0 1px 3px #178fe5;border-radius:3px}.has-event .pika-button{background:#005da9;box-shadow:inset 0 1px 3px #0076c9}.is-disabled .pika-button,.is-inrange .pika-button{background:#d5e9f7}.is-startrange .pika-button{color:#fff;background:#6cb31d;box-shadow:none;border-radius:3px}.is-endrange .pika-button{color:#fff;background:#3af;box-shadow:none;border-radius:3px}.is-disabled .pika-button{pointer-events:none;cursor:default;color:#999;opacity:.3}.is-outside-current-month .pika-button{color:#999;opacity:.3}.is-selection-disabled{pointer-events:none;cursor:default}.pika-button:hover,.pika-row.pick-whole-week:hover .pika-button{color:#fff;background:#ff8000;box-shadow:none;border-radius:3px}.pika-table abbr{border-bottom:none;cursor:help} The calculator will do the rest. What is an estimated due date during pregnancy? While all the information contained here is well-reseached and accurate, it shouldnt be used to self-diagnose problems or pregnancy concerns. Be prepared for a possible increase in nausea, fatigue, heartburn, and other pregnancy symptoms. "potentialAction": { Try to be patient; it usually lasts until the 14th week only. Thats because your second trimester is a time , Congratulations! How to calculate due date by conceptionHow to calculate due date based on last periodHow to calculate due date by ultrasoundHow to calculate IVF due dateHow to calculate due date for twins. The due date is a good indication of when you will give birth. It has finally moved into your pelvic cavity, the pressure on your diaphragm is released, and lightening happens. Baskett TF, et al. You may choose to have a more exact due date if you decide to deliver earlier than 40 weeks. For example, if it was frozen on day three, then you will be two weeks and three days pregnant on the date of transfer. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. At 33 weeks pregnant, your baby is the size of a pineapple. http://www.uptodate.com/contents/search. You calculate [EDD] using the first day of the last menstrual period [adding exactly one year to it], add seven days to that, and then subtract three months, she explains.