The nub theory claims to be more accurate than any of the old wives’ tales. Scan shot. The accuracy of the nub theory is dependent on the timing of the ultrasound. 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. How nub theory works Reading sonograms is not as easy as checking the nub or skull shape! I know the nub theory is just that, a theory. If you are unsure of which theory would be best, choose “Experts Decide,” and we will apply the most accurate theory for your scan. I wouldn't find out again I wouldn't trust them lol. From what I can tell in the 2nd picture, it looks like it would be a boy. 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. I've felt different with this pregnancy...vomiting (no ms with boys), skin break outs, brittle nails etc. to be fair it did look like a really typical boy nub, although ramzi at 6+2 said girl. It's hard to say though because the back is curved alot and mine wasn't. That sounds pretty dang good, however, you have to keep the size of … Either that or the nub theory just wasn't right for your DS! What is nub theory? I have 3 boys already and recently had scan at 13 +5 and two scan photos submitted to the gender experts have said boy. An ultrasound performed at 12 weeks is around 80 percent accurate while a scan conducted at 13 weeks may be closer to 94 percent accurate. But, there is a chance it could be wrong. 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. Some rely on the between the legs shot: This can be somewhat unreliable, especially at 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". 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. I've felt different with this pregnancy...vomiting (no ms with boys), skin break outs, brittle nails etc. If you are unsure of which theory would be best, choose “Experts Decide,” and we will apply the most accurate theory for your scan. Xx, Hi I also sent my scan pics to gender experts they said girl. How do u work out nub theory I downy understand yet x, Claremc, I'm no expert but Im guessing girl from my understanding of both nub n skull theory. Any input would be appreciated. So, on my experience I would say boy, but could be either. 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. Based upon studies, the accuracy increases with gestational age. But if there is a gender lean to baby's nub, the nub theory is about 98% accurate. Just a guess though! 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. 15 Weeks 99.6%. 13 Weeks 94%. 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! At 11 weeks, there was 70 percent accuracy in determining gender, and by 13 weeks, that number had jumped to more than 98 percent. By 13 weeks, there were no more misidentifications; 100% of their classifications were correct. 14 Weeks 98%. 2. But by 12 weeks this method’s accuracy shot up to 98%. We subscribe to the HONcode principles of the, Breastfeeding: the trick to a comfy latch. 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". I hope it is a girl for u tho xx. It's hard to say though because the back is curved alot and mine wasn't. Also, any of us experts are always available if you have any questions! What is nub theory? Most sonographers have never utilized nub theory at 13 weeks. There is a considerable discrepancy in fetal development between 11 and 14 weeks, or even between 12.5 and 13 weeks. If I don't cave I'll come back and post it in September!

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