title: Neural tube defects: British vitamin trial starts slowly.
mesh_terms: D002986:Clinical Trials as Topic; D035061:Control Groups; D005260:Female; D006801:Humans; D009436:Neural Tube Defects / Q000517:prevention & control*; D018579:Patient Selection; D011247:Pregnancy; D037841:Pregnant People; D012107:Research Design; D035842:Research Subjects; D018454:Spouses; D006113:United Kingdom; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins