title: Current world literature.
mesh_terms: D005260:Female; D006801:Humans; D009774:Obstetrics / Q000379:methods* / Q000639:trends*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000628:therapy; D047928:Premature Birth / Q000517:prevention & control; D011296:Prenatal Diagnosis / Q000379:methods