Spin bifida is the development congenital disorder caused by incomplete closing the embryonic neural tube. Detection is detectable by using ultrasound through scans known as "lemon sign" also by testing the mothers blood through AFP. 10-20% of the population and most people are diagnosed incidentally from spinal x-rays. treatment for spinabifida is can be surgically closed at birth but will no longer have normal function. it also a vertebrate overlying the spinal are not fully formed and remained unfused and open.