12 week ultrasound gender accuracy. At 12 weeks and over, the average success rate for correctly identifying gender, where gender identification was possible, was 94. Conclusion Prenatal gender assignment by ultrasound has a high accuracy rate at 12–14 At 11 weeks, there was 70 percent accuracy in determining gender, and by 13 weeks, that number had jumped to more than 98 percent. 8% for the female fetuses. Male gender may already be reliably determined when CRL ≥ 55 mm (gestational age ≥ 12 + 0). Aims: The aim of this study was to assess the feasibility and accuracy of fetal gender assignment by transabdominal ultrasound at 12-14 weeks of gestation. Gain insight into predicting fetal gender at 12 weeks. However, in fetuses identified as female at a CRL of <62. Also find out whether ultrasound, CVS or amniocentesis are accurate for predicting sex. The 12-week ultrasound can provide early gender clues by analyzing the genital tubercle’s angle, with about 70-80% accuracy. 4. The 12-week ultrasound gives your doctor information on an estimated due date, how many babies to expect, and the possibility of certain genetic disorders. " Can the 12-week ultrasound show the gender of my baby? At 12 weeks, it's usually too early to determine the baby's gender with certainty. Methods: Fetal gender assessment was performed in 1222 singleton pregnancies. These advancements can occasionally allow earlier glimpses of gender, but accuracy before 14 weeks remains limited. The accuracy of male gender assignment in this group was 99–100% at all ages, and that of female gender assignment was 91. Can the 12 week ultrasound get the baby's gender wrong? What's the most accurate gender prediction tool? The accuracy of gender assignment using the “axial view” was 100% at all ages. Ultrasound, Baby Boy Ultrasound, Baby Ultrasound And More Results Ultrasound imaging was performed in 150 pregnant women, 51 (34%) of whom were in their 11 th week of pregnancy and 99 (66%) in their 12 th week. * Accuracy: Over 99%, but also an invasive test with a small miscarriage risk. If you want to know for sure, ask your practitioner about genetic testing such as NIPT, which is about 95 percent accurate between weeks 7 and 12 and 99 percent accurate after week 20. Consult with your doctor to select what is suitable for you. Results Ultrasound imaging was performed in 150 pregnant women, 51 (34%) of whom were in their 11 th week of pregnancy and 99 (66%) in their 12 th week. 8%, with the accuracy at 13 weeks of 98. How often is the 12 week gender ultrasound wrong? Parents share their experience with incorrect ultrasound predictions in their pregnancy. 6% for the male fetuses and 96. At CRL ≥ 45 mm feasibility was 83. She adds that nub theory is most accurate after 13 weeks. Well I am new to this forum and can see that I am going to end up spending LOTS of time on here! I am a mommy to two beautiful little boys and am thirteen weeks pregnant! My husband and I are crossing our fingers for a little girl. 3K 12-13 weeks nub theory gender scan reveal #ultrasound #obstetrics #babyboy #pregnancy #3dultrasound #genderreveal #babygirl firstglimpse3d4d 12K Watch short videos about 12 week baby boy ultrasound from people around the world. At 12–14 weeks (nub theory), early structures can look similar and results are often cautious. Using the mid-sagittal view, we observed an accuracy of 98% for male gender assignment and 94% for female gender assignment. Prenatal gender assignment by ultrasound has a high accuracy rate at 12-14 weeks. A 12-week ultrasound checks your baby's development and estimates your due date. Here's how to use your scan to predict your baby's gender. Watch short videos about ultrasound scan accuracy for baby gender from people around the world. The positive predictive value for the ultrasound imaging gender identification was 87. 7% at 12 weeks, and 100% at 13 weeks. Yes, a 12-week ultrasound can often reveal the baby's gender, but accuracy can vary based on several factors. The 12-week sonogram can predict fetal gender with about 70-80% accuracy under optimal conditions. Timing is the biggest driver of gender ultrasound accuracy. A gender ultrasound can accurately predict whether you’re having a boy or girl. Jan 12, 2026 · Accuracy of Gender Ultrasound Predictions As it turns out, ultrasounds are pretty accurate for identifying whether a fetus has a penis or a vulva, particularly in the second and third trimesters. Watch short videos about gender ultrasound prediction accuracy from people around the world. Meta-analyses were performed using Revman 5. The most reliable window answering What Week Can You Tell Gender?, especially through ultrasound imaging, falls broadly between weeks 18 and 22 of pregnancy. These results indicate that invasive testing can probably be carried out in fetuses identified as males at this gestational age. The primary focus of the dating scan is to assess the baby's development and estimate your due date. A search was conducted on Medline, Cochrane Library, and EMBASE databases, and the reference lists of selected studies were also reviewed. . Learn about early possibilities, limitations, and when confirmation is more reliable. Gender identification is more likely during the gender foetal well being scan, typically around 16 to 18 weeks. Aug 3, 2025 · The accuracy of determining your baby’s gender increases with how far along you are in the pregnancy. Determination of the fetal gender in the first trimester is important in twin pregnancy cases of familial X-linked genetic syndromes and helps determine chorionicity. I have no idea what would make him think However, providers and ultrasound technicians are often able to differentiate fetal sex as early as 12 weeks,” says Skyler Jacobs, CNM, a certified nurse midwife with Modern Obstetrics and Gynecology of North Atlanta in Georgia. 6 mm, despite the relatively … Research Article Accuracy of Ultrasonography in Fetal Gender Determination in 11 to 14 Week of Gestational Age Raziyeh Behzadmehr 1, * , Khadije Rezaie Keikhaie2, ** and Rehaneh Behzadmehr Nub theory examines your baby's developing genitalia as early as 12 weeks to anticipate what the sex of your baby will be—but how accurate is it? The 12 weeks gender ultrasound offers a reliable glimpse into fetal sex with up to 90% accuracy when performed by skilled technicians. Your Phenotypic sex was confirmed in 555 newborns. Skull theory is a popular gender predictor method that uses the features you see on an early ultrasound to determine your baby's sex. We told our parents we were having a girl, but we warned them against buying anything until the next ultrasound. Apr 9, 2025 · The MFM said while ultrasound was 90 percent accurate in predicting gender at 12 weeks, and she and the sonographer were fairly confident in their prediction, we should wait until our 20-week anatomy ultrasound to be sure. A transabdominal ultrasound, which uses sound waves through your abdomen, is most commonly performed at 12 weeks. Is it a boy or a girl? Although gender prediction old wives' tales are just for fun, there are a few science-backed signs that it could be a boy or girl that may offer clues about your baby's sex. Twenty-eight studies met the criteria for inclusion in the Several factors influence accurate gender determination during a 12-week ultrasound. Gender, Accuracy, Ultrasound And More Watch short videos about 12 weeks gender ultrasound from people around the world. Conclusions Fetal gender may reliably be determined when CRL ≥ 60 mm (gestational age ≥ 12 + 2). Ultrasound (most common for “gender reveal”) Earliest (rough estimate): Some scans can make a cautious guess at 11–14 weeks, but accuracy is limited at that stage (around 70% at 11–12 weeks). This study demonstrated that the gestational age of the fetus has a material effect on the accuracy rate of gender determination. We assessed and compared the accuracy of first-trimester ultrasound scans, and At 10 to 14 weeks of pregnancy, you should be offered a pregnancy dating scan. Curious if you can tell your baby’s gender at 12 weeks? Learn how the nub theory works, its accuracy, and when to book your early gender scan at BellyView Ultrasound, Gold Coast. 5%. However, this isn’t guaranteed, and the scan accuracy depends on various factors, including the baby’s position. The 12 weeks ultrasound can offer a preliminary glimpse at your baby's gender, but accuracy varies and confirmation usually comes later. * An ultrasound “official reveal” around **18–22 weeks**. Gender, Accuracy, Scan And More 19. The Nub Theory uses a 12 week ultrasound picture to guess the sex of your baby. The genital tubercle, which develops into either a penis or clitoris, looks similar in both sexes until around 14 weeks. The gender of a baby can typically be determined with high accuracy between 18 to 22 weeks of pregnancy through ultrasound scans. The final success of fetal gender identification was about 91% in the 11 th and 12 th weeks of pregnancy. 1 and Meta-DiSc 2. Boy or girl? Get the lowdown on gender blood test accuracy. Gender, Ultrasound Baby Gender Reveal, Ultrasound Gender Reveal And More Ultrasound imaging performed in the 11th and 12th weeks of pregnancy for fetal gender identification identified the fetus either as a girl, a boy, or as a "gender not assigned. The present study had a much higher gender identification accuracy compared to other studies. 0. The ultrasound can help screen for disorders, check the heart rate, and count the number of fetuses. An early gender blood test around 6+ weeks , depending on what’s available where you live. Unfortunately, research into the theory's accuracy is lacking Ultrasounds can usually identify gender between 11-20 weeks. The baby’s position is a primary consideration; a curled-up or face-down baby can obscure the genital area, preventing a clear view. Learn what to expect during a gender ultrasound, including when to get it, how it works and how accurate it is for determining your baby’s sex. To purely find out the gender of your baby, a gender ultrasound at 16 weeks and 3D/4D ultrasound work well. 3% at 11 weeks to 98. The ultrasound scans done between 12-16 weeks have the highest rate of mistake, accuracy rate is 85-90 % due to small size, slight anatomical difference between penis or clitoris and constant movements of the baby. * Typical reliable window: 18–22 weeks at the detailed anatomy scan. The accuracy can vary from 70. This systematic review and meta-analysis aimed to assess the accuracy and success rate of ultrasound in determining fetal sex. Yes, gender can often be identified via ultrasound at 12 weeks, but accuracy varies based on several factors. The accuracy rate goes higher between 16 to 20 weeks, 95-98%, depending on baby, mother and operator related factors. Learn more about how it works and the characteristics to look for. 9% and accuracy 92. 13–17 Our study recorded a similarly high accuracy of 99% for sonograhic prenatal sex determination of fetuses If you are an expecting mother wishing to know the gender of your baby, BABYGRAM uses state-of-the-art AI-based Nub theory to analyze your 12-week ultrasound and provide 99 percent accurate gender prediction. Like many other non-scientific gender predictor tests, the nub theory is just a guess and not a solid way to find out the sex of your baby. The skull theory, also known as the skull gender theory, is the belief that you can accurately predict the gender of your baby by simply looking at the fetal skull shape during a 12-week ultrasound. This period balances fetal development maturity with non-invasive safety while maximizing accuracy—usually over 95%. If CRL < 50 mm (gestational age < 11 + 4) gender cannot be reliably predicted. However, providers and ultrasound technicians are often able to differentiate fetal sex as early as 12 weeks,” says Skyler Jacobs, CNM, a certified nurse midwife with Modern Obstetrics and Gynecology of North Atlanta in Georgia. Conclusion Prenatal gender assignment by ultrasound using the “axial view” has a high accuracy rate at 12–14 weeks. The gender can sometimes be identified at 12 weeks, but accuracy is limited and often improved with later scans. 1, 10–12 However lower sensitivities values have been reported with accuracy ranging from 93% to 99% in scans done within the second and third trimesters. * NIPT from about **10 weeks** , which can include sex. How Ultrasound Reveals Gender: The Science Behind It Ultrasound uses high-frequency sound waves to create images of your baby inside the womb. Well needless to say when I arrived home this evening with the ultrasound pics, he goes i'm sure its a boy!! Just look. Keywords: gender prediction at 12 weeks ultrasound, nubologists, nubology, boy or girl, he or she, gender prediction, nub theory, baby scan, 12 weeks, ultrasound, sonogram, its a girl, gender reveal This is an AI-generated summary of the content, and is not intended to provide factual context. Early ultrasound scans at 12 weeks, relying on the “nub theory,” are not highly accurate for definitive gender determination. It will let you know a more reliable due date and check how your baby is developing. 5% at 12 to 12 + 3 weeks, 99% at 12 + 4 to 12 + 6 weeks and 100% at 13 to 13 + 6 weeks. Watch short videos about baby ultrasound gender reveal from people around the world. Fetal gender identification at 11 Discover how nub theory uses 12-week ultrasound scans to predict your baby’s sex. 3% approaching that achieved by invasive testing. By 18–22 weeks, the anatomy scan usually provides the clearest view; if a scan is done earlier, reports may read “likely” or “not visualized,” and a short follow-up solves it. Accuracy improves the longer you wait , especially for ultrasound; earlier results are more likely to be inconclusive or wrong. In many studies 100% accuracy in prenatal gender assignment was achieved. The youngest female fetus whose gender was correctly identified was 11-week-old, and the youngest male fetus whose gender was correctly identified was 11 weeks and 1 day old. Gender prediction by ultrasound explained with scan timing, accuracy, theories, and expert tips for early and reliable results. Learn its accuracy, limits and how to try it for fun during pregnancy. 3roj2, guxea, 1weglu, y3cf, dcsh, 4htpp0, u1flk, nxr1, 7puaa, dzkq,