Answer:
The condition is called "Spinal Bifida", caused by lack of vitamin B12 which helps regenerate the active form of folate.
Explanation:
Because Lori is a vegan, her vitamin B12 intake which comes from animal products such as meat, is not enough. She has to take supplements to make up for the lack of it in her diet.
As stated in the question, this lack of vitamin B12 causes her child to have a defect in his spinal cord called Spinal Bifida that defines a spinal cord or spine that has not fully developed. The vitamin B12 is necessary for regenerating the active form of folate.
I hope this answer helps.