title: Duration of pregnancy.
mesh_terms: D001835:Body Weight; D005260:Female; D005313:Fetal Death; D005387:Finland; D006801:Humans; D007226:Infant Mortality; D007746:Labor Presentation; D011247:Pregnancy; D011248:Pregnancy Complications; D011644:Puerperal Disorders / Q000209:etiology; D012204:Rh-Hr Blood-Group System; D012723:Sex; D012924:Social Conditions; D013223:Statistics as Topic; D014593:Uterine Inertia
chemical_list: D012204:Rh-Hr Blood-Group System