mesh_terms: D035843:Biomedical Research / Q000639:trends; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000628:therapy*; D012219:Rheumatology / Q000639:trends*; D012307:Risk Factors; D025242:Spondylarthropathies / Q000097:blood*; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000628:therapy*