title: Haemoglobin concentration in pregnancy: relationships with maternal age and birth weight.
mesh_terms: D000293:Adolescent; D000328:Adult; D001724:Birth Weight; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy
chemical_list: D006454:Hemoglobins