Nub theory is a fun way to make a slightly-better-than-random guess at your baby’s sex after your 12-week ultrasound. (Hey, it’s probably more accurate than peeing in a cup of salt water to ...

The nub theory is all to do with all that age-old guessing game of whether you're having a boy or girl. It is a concept that explores how a fetus's reproductive organs develop and not based ...

The nub usually develops around 11 to 13 weeks. According to the nub theory, ... You may be asked to drink up to 6 glasses of water before your test so your bladder fills up.

The nub theory is based on predicting a child's gender at just 12 weeks Credit: Getty What is nub theory? The nub theory is also known as the angle of the dangle.

The nub theory is based on predicting a child's gender at just 12 weeks Credit: Getty What is nub theory? The nub theory is also known as the angle of the dangle.