Gender experts told me i was having a boy. Accuracy Of Nub Theory For Gender Prediction At 11-13 Weeks Nub Theory for gender prediction - Nub Theory at only 11 weeks Sex determination accuracy improves with an increase in gestational age starting from week 11 to 13+ 6. I kind of need people to say 'i had a clear picture and they were wrong'. My mum had three boys and then me so I have had it in my head that number 4 will be a girl but honestly after seeing these scans I am really starting to think boy. The nub theory isn't 100% so I would just wait until your 20 week scan to find out for sure instead of relying on the nub theory. “The purpose of the 12-week scan is a dating scan, to check how many babies we have in there, and that there is a heartbeat. Said they thought it was a boy but her 20 week scan showed baby was a girl. Each baby has a little nub of tissue called the ‘genital tubercle’ which will develop into a penis in a boy, or a clitoris in a girl. #8 cheshire , Jun 29, 2012 ... even the experts can get it wrong! hi i can tell you iv tried this on all of my scans (12 week) and that was 4. it was right twice but wrong the other 2 times which would add up seems theres 50/50 chance it can be either. But has anyone had any experience with it being wrong? Image: iStock. 13th Week: Almost a Lock! Determine the nub angle. Please ensure the image is in profile view (sagittal) and your scan is … It's possible to have different symptoms and have same sex babies (I've heard.. No experience), Theres a forum called in gender thats really good. 2. Gender guessing with the nub increases in accuracy as you hit 13 weeks, and is at its very lowest of accuracy in the 11th week. Scan shot. Most sonographers have never utilized nub theory at 13 weeks. Either that or the nub theory just wasn't right for your DS! How nub theory works The #1 app for tracking pregnancy and baby growth. Between 11-13 weeks, all babies are said to have a ‘nub’ between their legs called the genital tubercle, and according to this theory the angle of the nub will indicate whether it’s a boy or girl. Claire found out with her two boys and one girl. Always a chance. If you are unsure of which theory would be best, choose “Experts Decide,” and we will apply the most accurate theory for your scan. Don't know about you but my sonographers had to take a long hard look at different angles to confirm gender, yet still having the humility to say they may not be accurate. xx, I sent three scans to gender experts, all said definite boy. i has my ultrasound done at 13 weeks and the sonographer said it’s over 90% chance I’m having a boy. BabyCentre may earn a commission from shopping links. The basics of the Nub theory are simple and straight forward (no pun intended), it's all about the angle of the genital tubercle. What is nub theory? Nub theory, how accurate were your predictions? According to statistics, 11 weeks may be too early to use the nub theory to predict the baby’s sex. How nub theory works Don't get disheartened, 16 weeks will be here before you know it and it will be so much more accurate xx. At 11 wks, the accuracy is only approx. Draw the nub line. Gender determination accuracy by weeks. Choose Ramzi Theory (most accurate between 6-8 weeks gestation), Nub Theory (12-14 weeks), or Skull Theory (12+ weeks) for our Experts to analyze to predict the sex of your baby as early as possible. From what I can tell in the 2nd picture, it looks like it would be a boy. At 11-13 weeks, all babies are believed to have a 'nub' between their legs called the genital tubercle, and according to the Nub Theory, the angle indicates the baby's sex. It is only a theory and I have hear a few people say it turned out to be wrong. 15 Weeks 99.6%. Choose Ramzi Theory (most accurate between 6-8 weeks gestation), Nub Theory (12-14 weeks), or Skull Theory (12+ weeks) for our Experts to analyze to predict the sex of your baby as early as possible. I wouldn't find out again I wouldn't trust them lol. I sent 2 pics to the gender experts as like you I was dying to find out (even though I was well aware it may be inaccurate lol) they predicted girl on both pics and she is indeed a girl. There is a considerable discrepancy in fetal development between 11 and 14 weeks, or even between 12.5 and 13 weeks. From 12.5 weeks to 13 weeks (a matter of a few days) a nub can image parallel, but develop that little bit later and be confirmed boy, this happens in around 6% of baby's and the term used is "late riser". At 13 weeks gestation and above you may be able to get an opinion from your sonographer, but don't take it as gospel. They also go on to say that the male marker shadow was evident from the picture. If you are unsure of which theory would be best, choose “Experts Decide,” and we will apply the most accurate theory for your scan. So, on my experience I would say boy, but could be either. Of course, the key to drawing the nub line is being able to identify the nub. Just a guess though! Had a similar pregnancy to my daughter x, I am so pleased to hear the above.. Predictions prior to 12 weeks are discouraged , and some sonography departments will actually refuse to give you a prediction under a certain gestational age. Either that or the nub theory just wasn't right for your DS! Your sonogram appointment could be during the phase where the nub test is more often wrong than right. They also go on to say that the male marker shadow was evident from the picture. “The basis of the theory is that this tube causes an angle with the lower part of the spine – and if that angle is less than 30 degrees it’s a gi… At the end of the 11th week going into the beginning of the 12th week most nubs will image parallel and the term used for this is "early girl". The nub theory works on the basis that from 12 weeks, boys' genitals (or the genital tuber, as they are not actually properly shaped bits and pieces at this stage, and both sexes will have a little tube- like protrusion) will be angled differently to a girls', and so by carefully examining your scan picture, you can work out the sex. I have 3 boys already and recently had scan at 13 +5 and two scan photos submitted to the gender experts have said boy. Prior to 16 weeks, the baby will be no bigger than a small chocolate bar. I also sent two different pics of my scan (same baby) off to them and got told first one was a boy, second was a girl lol, Everyone said mine was a girl and Wednesday found out it was a boy! It’s said that if the nub is over 30 degrees up from the spine, it’s a boy – but if it’s under that then it’s a girl. They also go on to say that the male marker shadow was evident from the picture. A scan at eleven weeks may not reveal anything, at twelve weeks gestation the nub theory is approximately 75% accurate and just one week later at thirteen weeks it’s thought to be around 95% accurate. I've heard that at 13 weeks it can be around 94% accurate using the nub theory. I found out the sex of all three of my babies between 12 and 13 weeks along by way of an ultrasound, with three different technicians, all based on the nub theory. Up until this I didn’t realise nub theory was actually a professional way of telling gender and didn’t think anyone would even tell me this early. So, on my experience I would say boy, but could be either. I have 3 boys already and recently had scan at 13 +5 and two scan photos submitted to the gender experts have said boy. From what I can tell in the 2nd picture, it looks like it would be a boy. It is supposedly the earliest point of prediction using modern technology; however it is only 40-60% accurate. But when they guessed it was a girl, they were often wrong. Congratulations, 12 week nub theory was wrong for me too. This is where the nub theory comes in. So my question is how likely are they to be wrong as I'm feeling very deflated as I obviously would love a girl after having three boys. Image: iStock. Trouble is I've got my own theory now. Reading sonograms is not as easy as checking the nub or skull shape! The nub on your scan picture looks the same as my ds2's on his 12 week scan, everyone said he was a girl 1 person said boy out of about 20 people! By 13 weeks, there were no more misidentifications; 100% of their classifications were correct. The ‘Nub Theory’ suggests it’s possible to tell the gender of your child in an ultrasound scan from as early as 12 weeks. : Hey everyone! Choose Ramzi Theory (most accurate between 6-8 weeks gestation), Nub Theory (12-14 weeks), or Skull Theory (12+ weeks) for our Experts to analyze to predict the sex of your baby as early as possible. But I think it probably is 50/50 they are bound to be right some of the time just like their wrong some of the time. If it's pre 13 weeks there's a chance of the nub "rising" that's why any guesses, especially for a girl, pre-13 weeks are usually cautious. Until about 13 weeks of pregnancy, the genitals of a boy look much the same as those of a girl. 15 Weeks 99.6%. Is the Nub theory accurate? 13 Weeks 94%. Even the position that baby is lying in can effect the accuracy of predictions. From 12.5 weeks to 13 weeks (a matter of a few days) a nub can image parallel, but develop that little bit later and be confirmed boy, this happens in around 6% of baby's and the term used is "late riser". We are always just a PM away Link to PDF of published medical study establishing the Nub Theory 1999 Example boy nubs. But, there is a chance it could be wrong. xx, The gender experts got my friends scan wrong. The nub theory claims to be more accurate than any of the old wives’ tales. But by 12 weeks this method’s accuracy shot up to 98%. I hope it is a girl for u tho xx. to be fair it did look like a really typical boy nub, although ramzi at 6+2 said girl. * 12 Weeks 88%. But if there is a gender lean to baby's nub, the nub theory is about 98% accurate. 14 Weeks 98%. You can post your photo & they will explain how they reach there decision in detail if you ask. They also go on to say that the male marker shadow was evident from the picture. They also go on to say that the male marker shadow was evident from the picture. If you are unsure of which theory would be best, choose “Experts Decide,” and we will apply the most accurate theory for your scan. Some rely on the between the legs shot: This can be somewhat unreliable, especially at 13 weeks. It is around your first scan, 11-13 weeks of pregnancy, that babies have what is known as a 'nub' between their legs.