A woman gave birth to a child with a bent vertebral column. Which is a possible reason?
The mesoderm layer may have developed abnormally.
The ectoderm layer may have developed abnormally.
The endoderm layer may have developed abnormally.
The mesoderm layer may have developed abnormally.
The ectoderm layer may have developed abnormally.
The endoderm layer may have developed abnormally.