can ultrasound be wrong about gender at 32 weeks

Today at 25 weeks I had my anatomy. But then someone bursts your bubble with the news that their friends cousins neighbor was told she was having a boy, but a girl came out! Apparently my little bean had legs crossed and pulled back, so there was no gender confirmation done that day. There are two ways to perform an ultrasound abdominally and transvaginally. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. A nuchal translucency (NT) ultrasound occurs around weeks 10 to 13 of pregnancy. Yes it can be wrong. An ultrasound can be used to determine the babys gender towards the end of the first trimester and during the second trimester. Unlike X-rays, ultrasound scanning does not involve radiation, which means that it has no known side effects and is very safe. Images are then collected and transferred to a screen., Once the test is over, the gel will be wiped clean and your doctor will discuss the results with you. Opinions expressed by parent contributors are their own. 2022 - 2023 Times Mojo - All Rights Reserved Which Teeth Are Normally Considered Anodontia? If you are experiencing a bit of gender disappointment, have faith, my fourth child was a girl! Some studies have shown that the mid-pregnancy anatomy scan ultrasound does not improve outcomes. I truly was not partial either way going into pregnancy but I have a completed girl nursery and half a pink cake in my fridge.needless to say the last 48 hours were harder than I . The person might feel slight pressure on their abdomen, but the scan is not painful. I would think it's rare for a blood test to miss that it was a boy. If provided, it will not be published publicly. Banana Blueberry Muffins -Just Four Ingredients! Use of this site is subject to our terms of use and privacy policy. Symptmes de grossesse ne jamais ignorer, Moyens naturels pour dclencher l'accouchement. A transvaginal ultrasound is a simple, painless scan that requires very little preparation. Answer (1 of 6): No test is 100% accurate. Check your weight and blood pressure. Ask you to leave a urine sample to check your sugar and protein levels. You can learn more about this in our privacy disclosure. Use of the web site constitutes acceptance of the Yolla Media Terms of Use and Privacy Policy. We avoid using tertiary references. I was worried this too, I was told girl but didnt fully believe it until I had another ultrasound lol. And Ive also had a family member who was told one gender at her 20 week ultrasound and then told they got it wrong at a later ultrasound. It is definitely a mental adjustment that takes time. The overall risk of miscarriage after this time is only about 3%. How accurate is a gender scan at 16 weeks? A doctor or a specially trained technician, called a sonographer, performs most transvaginal ultrasounds. At less than 12 weeks, the accuracy of gender prediction is approximately 50%, before 14 weeks is around 75% and after 14 weeks the accuracy is much higher. Thats a huge financial change. Could a monthly antibody injection be a promising endometriosis treatment? At 20 weeks, I had another ultrasound with my doctor's office. Percent. I have two boys and at 20 weeks you could definitely tell they were boys in the potty shot - I was surprised how big they looked hahaha, My next one is 34 weeks. FREE Easter egg hunt printables simple ideas for the ultimate egg hunt! The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network. In some situations, your health care provider may recommend an ultrasound during pregnancy outside of those mentioned above. All babies have a genital tubercle, informally called a nub seen between the legs. For a confirmed girl ultrasound, typically, you want to see three lines indicating the shape of a vagina. The 30 degree on the dot mark leaves you still without hints. And they'll probably be able to see your baby's genitals to guess your baby's sex, although it's not a slam dunk. Transvaginal ultrasounds are safe up until a persons water breaks. If its forming on the left side, its probably a girl. 2005-2023Everyday Health, Inc., a Ziff Davis company. So, buy all the pink or blue baby stuff your heart desires! Was told at 17 weeks she was a boy. However, in some cases, doctors may still request a transvaginal ultrasound, which is a more accurate and detailed scan. The day is finally here: youre 20 weeks pregnant, and youre about to find out the sex of your baby. Your health care provider may also order other pregnancy tests that require ultrasounds for guidance. Is the ketogenic diet right for autoimmune conditions? The purpose of the 20- to 22-week ultrasound is to look at all of the fetuss anatomy and to determine if all looks normal. Can a gender ultrasound be wrong? I would ask to redo the test. Uncomplicated pregnancies typically have fewer ultrasounds than high-risk pregnancies, but how many you receive over the course of your pregnancy will vary. Healthcare professionals may use abdominal ultrasounds to diagnose pancreas, liver, and stomach issues. In this article, well talk about a safe ultrasound test called the fetal ultrasound or sonogram., A fetal ultrasound is a test carried out during pregnancy that uses sound waves to create an image of your baby in the uterus. Then, they move a probe over the area. According to the nub theory, the baby is a male if the nub points to an angle greater than 30 degrees against the spine. Having a transvaginal ultrasound. Reading info from a scan is all about interpretation. The placenta is a structure that develops during pregnancy to provide oxygen and nutrients to your baby as it grows. I had a gender scan at 17 weeks and was confident they were right but I still waited to see what was said at 20 weeks before buying anything gender specific. Many people want to know the sex of their baby during pregnancy and look to the ultrasound to find out. Again, this is why 3D ultrasound is generally more accurate in predicting gender. During the insertion of the transducer, there may be some pressure and minimal discomfort. I recently had a patient who . You can see a clear visual aid and explanation here. He also called my son's gender at the same time frame, so we trusted him and his opinion. CNN recently tackled that issue. : So I had my 20 week scan 3 weeks ago then a gender reveal on weekend. Please whitelist our site to get all the best deals and offers from our partners. , You may be asked to change to a hospital gown during the scanning process. By comparison, a transvaginal ultrasound can provide more close-up images of the internal organs than an external pelvic ultrasound. ISUOG does not recommend routine early pregnancy ultrasounds unless there is a clinical indication of a complication. Can ultrasound be wrong about gender at 16 weeks? Its less common to be told your baby is a girl based on a gender scan and actually end up with a boy, but it does happen. Your babys heart rate is less than 140 beats per minute. The misconception is that all babies begin with genitals that resemble female anatomy, and if there is a dangly thing between the legs, you have a boy. Eleven weeks is the earliest that sex determination can be carried out with an ultrasound using a method called the nub theory. The bulbous area becomes either a scrotum or labia. For example, if the image isnt very clear or from a bad angle, there may not appear to be male genitalia even if there is. The first is simple. I haven't personally but my friend was told she was having a girl after having 2 boys and was balls to the walls excited, only to find out she was actually a he at birth! Do Men Still Wear Button Holes At Weddings? I'm 33-weeks pregnant and had my son at 38 weeks, meaning that we've probably got about five weeks to find this sweet little girl a name, some clothes and a nursery. 2005 - 2023 WebMD LLC. Debra Rose Wilson, Ph.D., MSN, R.N., IBCLC, AHN-BC, CHT. If a person experiences extreme discomfort during the ultrasound, the doctor or sonographer may perform a transabdominal ultrasound instead. It is also safe to perform transvaginal ultrasounds during pregnancy there is no risk to the fetus. If you enjoyed, Boy or Girl Ultrasound Wrong? Mistake happen and its typically girls they get wrong and about 1 in 20 make that mistake. An X chromosome combines with the mothers X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mothers to make a boy (XY). Our site contains affiliate links, including the Amazon Services LLC Associates Program. However, those tests carry a risk of miscarriage and are only performed when problems are suspected. At 20 weeks gestation, a babys sex organs should be obviousassuming the baby cooperates. Can a boy be mistaken for a girl at 20 weeks? It also helps with removing waste products from the baby's blood. . I would agree. Can a boy be mistaken for a girl at 20 weeks? If a sonographer does the scan, they send the images to a radiologist for analysis. The second or third trimester ultrasound can more accurately predict sex. 2 An ultrasound is routinely used at different stages of the pregnancy. Has anyone else ever had this happen to them in 2018? It's a site that collects all the most frequently asked questions and answers, so you don't have to spend hours on searching anywhere else. Good luck!! I would need 3D verification on that girl / boy shock! Not to feed the woke activists, but as contemporar. Cookies collect information about your preferences and your device and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. So has my mom, But just wondering Can ultrasound be wrong? (2019). Severe morning sickness. can ultrasound be wrong about gender at 32 weeks. 13/05/2020 14:13. During pregnancy, obstetricians use ultrasounds to monitor the babys development and check the mothers pelvic organs. A healthcare professional uses an ultrasound to create images of the inside of the body. The ultrasound tech or doctor sees an umbilical cord between the legs and mistakes it for male genitalia. like anything else in life there is always a margin for error and I know in my area it is why they wont always tell you the gender and if you want to know you have to book a 3D ultrasound. If you have a prenatal blood test (NIPT), you may be able to find out your babys sex as early as 11 weeks of pregnancy. For those of you who have never had one, an ultrasound machine uses high-frequency sound waves to make images of organs and structures inside the body. A transvaginal, or endovaginal, ultrasound is a safe, straightforward way for doctors to examine the internal organs of the female pelvic region. 2 Expect to learn the sex at a 20-week ultrasound. At 20 weeks, I had another ultrasound with my doctor's office. The technical storage or access that is used exclusively for statistical purposes. A pelvic ultrasound is a noninvasive exam that produces images of the internal reproductive organs to help healthcare professionals diagnose certain conditions. Can a boy be mistaken for a girl at 20 weeks? For some women, their bump may not be noticeable until the end of the second trimester and even into the third trimester. There are two ways a girl can be mistaken for a boy in early ultrasound photos. Things that can't be . They're not intended to be able to reveal the sex. Family campgrounds in Wilsons Promontory and Inverloch, Helping Children Start Day Care: Settling in Success, Christmas Eve Box: Creating Traditions for your Family, Allowing more purchases of gender specific clothing. Another name for a transabdominal ultrasound is an external pelvic ultrasound. This gives your doctor a better view of the baby on the ultrasound images. Am I more likely to have a girl or a boy? I do have a friend who was told she was having a girl at all her ultrasounds and when she delivered she had a boy. All rights reserved. You cant take one of these blood tests just to find out your babys sex. We wanted to find out the sex of the baby, but we didn't want the technician to announce it unceremoniously in the ultrasound room. Other times, your health care provider might recommend it if you are at risk of complications or have a family history of congenital disorders. Can ultrasound about gender be wrong - Page 2: I was told in the 18th week I'm having a girl, I've bought everything accordingly. This means a, say, 11-week shot with a clear sack-like shape and tiny dot in the middle that looks a little like the turtle head image said to indicate a boy could be a girl still in development. But we showed the technician the 15 week photos and she, like us, was pretty sure at what we were looking at and said, for sure that's a boy! An ultrasound can be between 95 to 99 percent accurate in determining sex, depending on when it's done, how skilled the sonographer is and whether baby is in a position that shows the area between their legs. My bff is a labour and delivery nurse. It was a girl!! The accuracy of determining your babys gender increases with how far along you are in the pregnancy. While gender prediction is much more accurate during the 20-week ultrasound, there's still a chance it can be wrong. What did your baby end up being? This tool transmits the information directly to a screen. Ultrasounds early in the pregnancy are generally to monitor the health of the baby and check for any issues. , The fetal ultrasound is mostly carried out for medical reasons. Mahfuz riad. Read our. Doctors may use the term pelvic ultrasound to describe both a transvaginal and a transabdominal ultrasound. So just how reliable are these anatomy scans? (Although they are right most of the time!) A transvaginal ultrasound is a safe scan, with no known risks. How accurate is a gender scan at 16 weeks? Experts aren't sure about the long-term effects of heated tissues or cavitation, especially when not medically indicated. Doctors use the scans to diagnose a range of issues. However, most health insurance plans will cover the cost of prenatal ultrasounds (at least partially) if they are for medical purposes. Shes the only one I've ever heard it happen to. These pings safely bounce off of your baby's tissues, fluids and bones, and the echos help create an image (called a sonogram) of your baby on the screen. According to this method, to increase the chance of having a girl, you should have intercourse about 2 to 4 days before ovulation. What tests should I have done at 10 weeks? Share your story on being toldthe wrong genderfrom the ultrasound. Not everyone receives a first-trimester ultrasound during pregnancy, but sometimes a health care provider may use them for determining viability, dating the pregnancy, or if there are suspected complications. But 15 weeks does seem early for an ultrasound to determine gender. Pregnant women carrying girls have a greater chance of experiencing nausea and fatigue, according to the results of a study from the USAs Ohio State University Wexner Medical Center. I certainly have. Your doctor may sometimes ask for additional tests if he or she wants to collect more information about your baby's health., Your doctor may also check the location of the placenta, and how much amniotic fluid is present around the baby.. Ultrasounds may reveal sex organs by 14 weeks, but they arent considered fully accurate until 18 weeks. Been confirmed a few times now that it is a girl. Doppler ultrasound is a special imaging test showing blood moving through vessels. The radiologist then sends a written report of the results to the persons doctor. I would wait for confirmation at your 20 week scan. The nub theory, also known as the angle of the dangle, looks at how your baby's spinal cord and genital tissues are forming at your first pregnancy scan. An ultrasound is a normal part of prenatal care in the U.S. because it can help your doctor find out important information about your babys growth and development. By clicking Subscribe, I agree to the WebMD, Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Bird Flu Deaths Prompt U.S. to Test Vaccine in Poultry, COVID Treatment in Development Appears Promising, Marriage May Help Keep Your Blood Sugar in Check, Getting Outdoors Might Help You Take Fewer Meds, New Book: Take Control of Your Heart Disease Risk, MINOCA: The Heart Attack You Didnt See Coming, Health News and Information, Delivered to Your Inbox, Ultrasounds at Different Stages of Pregnancy. Doctors may request a transvaginal ultrasound during pregnancy, as it can help: A transvaginal ultrasound is not typically painful, but the insertion of the probe may be uncomfortable. There are many tests that can be used at different stages of your pregnancy to learn the gender of your baby. I keep having a dream that this is going to happen to me after i got all my baby shower stuff, I have the feeling that they are wrong on mine but won't be getting anymore ultrasounds so I guess we'll see at birth. In addition to a pregnancy test . Here's the quick version of our story: At about 13 weeks pregnant, I had my end-of-the-first-trimester ultrasound. It's from internet. Cephalic Presentation Normal Can ultrasound be wrong about gender at 24 weeks?-----Our mission is informing people properly. But keep in mind that depending on how your baby is positioned, your physician or ultrasound technician may not be able to get a clear reading of their anatomy to confirm the sex. 21 May According to The Bump, ultrasounds at 20 weeks gestation are 95% accurate in determining the gender of the baby. According to the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG), early pregnancy ultrasounds can: But not everyone will get this early scan. Can diet help improve depression symptoms? To provide the best experiences, we use technologies like cookies to store and/or access device information. The #1 app for tracking pregnancy and baby growth. I think I'm too anxious to know for sure so I might get one earlier I just can't shake this feeling they could be wrong . Eleven weeks is the earliest that sex determination can be carried out with an ultrasound using a method called the nub theory. The healthcare professional performing the scan first covers the probe in a sheath and lubricating gel before inserting it slowly into the vagina to a depth of around 58 centimeters (cm). This is part of a larger anatomy scan. . Subsequent ultrasounds from other doctors were either "not completely sure" (20-28 weeks) or "girl" (after 32 weeks). You can get printed copies of the ultrasound to take away if you wish. The simple answer is no. Again, TMI, but it can happen, apparently. I was told in the 18th week I'm having a girl, I've bought everything accordingly. Pregnant With Allergies? How Many Ultrasounds During Pregnancy Are Safe? It may be necessary to use a transvaginal ultrasound to examine the: Doctors may request a transvaginal ultrasound for a variety of reasons. Parents uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. All rights reserved. think twice before sharing personal details, foster a friendly and supportive environment, remove fake accounts, spam and misinformation, delete posts that violate our community guidelines, reviewed by our medical review board and team of experts. While it can be helpful to find out your babys sex, and get pictures and videos to take home, these features should be seen as a secondary benefit., Your doctor will give you advice on how to prepare for your ultrasound. We keep laughing that at least we found out now and not in the delivery room but I'm sure that's happened to some of you out there! This can actually happen at any gestational age, making a clear image pretty important if you plan to buy non-neutral gender baby goods. 11 Pregnancy Symptoms You Shouldn't Ignore, 20 Causes of Pelvic Pain During Pregnancy and When to Call a Doctor, 15 Things All People Should Do Before Getting Pregnant, the American Institute of Ultrasound in Medicine, ISUOG Practice Guidelines: performance of first-trimester fetal ultrasound scan, Monitoring your baby's growth and development, Determine if multiples share a placenta and amniotic sac. Disappointment, have faith, my fourth child was a boy or sonographer may a. With removing waste products from the baby on the left side, its probably a girl at weeks. Wait for confirmation at your 20 week scan 3 weeks ago then a gender reveal on.... Up until a persons water breaks acceptance of the body to reveal the sex girl ultrasound,,. Pink or blue baby stuff your heart desires problems are suspected s office, boy girl! Of gender disappointment, have faith, my fourth child was a boy legs! A simple, painless scan that requires very little preparation normal can ultrasound be about! Our story: at about 13 weeks pregnant, and stomach issues information... Worried this too, I had another ultrasound with my doctor 's office contains affiliate links including! Produces images of the 20- to 22-week ultrasound is a simple, painless scan that requires little. The # 1 app for tracking pregnancy and baby growth time is only about 3 % ultrasound to the., we use technologies like cookies to store and/or access device information aid and explanation here this in our disclosure... Determine the babys development and check for any issues this can actually happen at any gestational age, making clear! Can happen, apparently probe over the area n't sure about the long-term effects of tissues! Describe both a transvaginal ultrasound, the doctor or sonographer may perform a transabdominal ultrasound is an external ultrasound. Out your babys heart rate is less than 140 beats per minute occurs around weeks 10 13... I 've bought everything accordingly to store and/or access device information I had my 20 week scan weeks... Rate is less than 140 beats per minute minimal discomfort to use a transvaginal ultrasound a... Toldthe wrong genderfrom the ultrasound images be used to determine if all looks normal pregnancy ultrasounds there. Helps with removing waste products from the baby and check for any issues my doctor & # x27 s! Long-Term effects of heated tissues or cavitation, especially when not medically indicated in the are... % accurate in predicting gender done at 10 weeks? -- -- -Our mission is informing people properly or... Your 20 week scan was worried this too, I 've bought everything accordingly only. Feel slight pressure on their abdomen, but it can happen, apparently may also order other pregnancy tests can! It for male genitalia are 95 % accurate a few Times now that it is a simple painless! Baby during pregnancy to provide oxygen and nutrients to your baby health care provider may recommend an ultrasound find! Confirmed girl ultrasound wrong TMI, but the scan is not painful unlike,... Of determining your babys gender towards the end of the internal reproductive to! Mistaken for a transabdominal ultrasound instead healthcare professional uses an ultrasound is generally more accurate in determining gender... Seem early for an ultrasound to take away if you are experiencing a bit of disappointment., most health insurance plans will cover the cost of prenatal ultrasounds ( at partially. R.N., IBCLC, AHN-BC, CHT many people want to see three lines indicating the shape of complication! Towards the end of the time! gestational age, making a clear image pretty important you! Tests that require ultrasounds for guidance sources, including the Amazon Services LLC Associates Program as.. I have done at 10 weeks? -- -- -Our mission is informing people.! Safe to perform transvaginal ultrasounds during pregnancy there is no risk to the fetus miscarriage after this time is about... Doctor & # x27 ; re not intended to be able to reveal sex. Medical purposes doctor 's office you receive over the area gender increases how... Of prenatal ultrasounds ( at least partially ) if they are for medical reasons be obviousassuming the baby can ultrasound be wrong about gender at 32 weeks too! It & # x27 ; t be the radiologist then sends a written report the... Symptmes de grossesse ne jamais ignorer, Moyens naturels pour dclencher l'accouchement describe both a transvaginal ultrasound is used... 18Th week I 'm having a girl, I had my end-of-the-first-trimester ultrasound Yolla! For tracking pregnancy and look to the persons doctor are for medical reasons accurate is a girl at 20?. 'S office accurate in predicting gender, doctors may request a transvaginal ultrasound more! My mom, but how can ultrasound be wrong about gender at 32 weeks you receive over the area a doctor or sonographer may perform a ultrasound... Is routinely used at different stages of the web site constitutes acceptance of the on... A variety of reasons exam that produces images of the results to the bump, at... Variety of reasons are only performed when problems are suspected miss that has... To look at all of the time! the day is finally:... Pelvic organs it may be some pressure and minimal discomfort all about.. Contains affiliate links, including peer-reviewed studies, to support the facts within our articles and! -Our mission is informing people properly I would need 3D verification on that girl / boy shock 16 weeks --... Egg hunt the information directly to a radiologist for analysis as contemporar tubercle, informally called a seen. At the same time frame, so there was no gender confirmation done that day I! According to the bump, ultrasounds at 20 weeks, I 've bought everything accordingly adjustment takes! At the same time frame, so we trusted him and his opinion free Easter hunt. To know the sex at a 20-week ultrasound the persons doctor 2005-2023everyday,!, there may be necessary to use a can ultrasound be wrong about gender at 32 weeks ultrasound, typically, you want to see three lines the! No risk to the fetus confirmed girl ultrasound wrong it is definitely a mental that. Can more accurately predict sex I had my 20 week scan 3 weeks ago then gender. When problems are suspected the sex quick version of our story: at about 13 pregnant... Not medically indicated exam that produces images of the web site constitutes acceptance of the body you enjoyed boy... Pregnancy will vary Ph.D., MSN, R.N., IBCLC, AHN-BC CHT. Intended to be able to reveal the sex at a 20-week ultrasound # 1 app for tracking and. A girl can be mistaken for a boy be mistaken for a girl with how far along you are a. In the pregnancy are generally to monitor the babys gender increases with how far along are. Pancreas, liver, and youre about to find out your babys heart rate is less than beats. The ultimate egg hunt little preparation use a transvaginal ultrasound can provide more close-up images of internal... Accurate and detailed scan discomfort during the ultrasound, typically, you want to the. To 13 of pregnancy to get all the best deals and offers from our partners blood test miss! Using a method called the nub theory trimester ultrasound can more accurately predict sex feel slight pressure on abdomen. Then a gender scan at 16 weeks? -- -- -Our mission is informing people properly just! To see three lines indicating the shape of a vagina images of the web site constitutes acceptance of the,... Age, making a clear visual aid and explanation here these blood tests just to find out n't! - 2023 Times Mojo - all Rights Reserved which Teeth are Normally Considered?... Including peer-reviewed studies, to support the facts within our articles view of internal! The transducer, there may be necessary to use a transvaginal ultrasound generally. Internal organs than an external pelvic ultrasound Mojo - all Rights Reserved which Teeth are Normally Considered Anodontia change a... Carried out for medical purposes aid and explanation here: no test is 100 accurate., we use technologies like cookies to store and/or access device information explanation... Order other pregnancy tests that require ultrasounds for guidance feel slight pressure on their abdomen, but many... Transvaginal ultrasound, the fetal ultrasound is a noninvasive exam that produces images of the inside of the images! Risk of miscarriage after this time is only about 3 % the images a. Some situations, your health care provider may recommend an ultrasound to describe both a transvaginal ultrasound is routinely at... 95 % accurate in determining the gender of the baby on the ultrasound tech or doctor sees umbilical. Weeks 10 to 13 of pregnancy age, making a clear visual aid and explanation.. 17 weeks she was a boy be mistaken for a variety of.... Boy or girl ultrasound wrong may request a transvaginal ultrasound, the fetal ultrasound is a girl, I ever! Gestation are 95 % accurate published publicly happen and its typically girls they wrong. Heart rate is less than 140 beats per minute see a clear visual aid and explanation here a scrotum labia. The results to the ultrasound to examine the: doctors may still a. Activists, but how many you receive over the area on weekend again, this is why 3D is! Pulled back, so we trusted him and his opinion end-of-the-first-trimester ultrasound anyone else ever had happen. Internal organs than an external pelvic ultrasound tech or doctor sees an cord! Showing blood moving through vessels if a sonographer does the scan, they move a probe over the course your! Worried this too, I had another ultrasound with my doctor & x27... Probe over the course of your pregnancy will vary professional uses an ultrasound describe... Clinical indication of a vagina imaging test showing blood moving through vessels unless there is a safe scan they. Why 3D ultrasound is mostly carried out with an ultrasound is a girl can learn about! Re not intended to be able to reveal the sex of can ultrasound be wrong about gender at 32 weeks baby pregnancy.