The Nub Theory
The nub theory is the theory most popular as a gender predictor within the first trimester. The theory can decide whether you are having a boy or a girl with the ‘angle of the dangle’! The genital tubercle develops into either a penis or clitoris and this is possible to view from around 12 weeks by analysing the ‘nub’ in relation to the spine. If your unsure on how to read your scan, then gender predictors can tell you your gender prediction. Accuracy rating increases much nearer to week fifteen (99.6% males and 97.4% females).
The Ramzi Method
The Ramzi Theory is the earliest baby gender predictor to be used within the first trimester of pregnancy. The ramzi theory also known as the Ramzi method detects fetal gender between gestation weeks 6-8. The Ramzi method uses the placenta/chorionic villi location as a marker for fetal gender detection. This method correctly predicts the fetus gender in 97.2% of males and 97.5% of females early in the first trimester.
The Skull Theory
The Skull Theory originated from the Anthropological approach to the study of humans. Male skulls are more blockier and large compared to the female skull which are more round and delicate. These differences only develop during maturity. Although there are no medical evidence to support this gender theory. It has developed a trend over the years as a method of gender prediction on many pregnancy sites. Many mums-to-be claim it to have a high accuracy rate (92%).