Spina Bifida is a neural tube defect. When you do the (MS)AFP they will check for the possibility also on ultrasounds they can usually look at the spine of the fetus and see if it's closed or open. I don't believe it's a genetic disease more an enviromental and developmental one. Prenatals and folic acid in particular help protect against the embroyonic development of NTD's
Re: Birth Defect Question