title: Estimation of gestational age by last menstrual period, by ultrasound scan and SP1 concentration: comparison with date of delivery.
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000032:analysis; D012016:Reference Values
chemical_list: D011268:Pregnancy-Specific beta 1-Glycoproteins