title: On twin care: early detection of twin pregnancies with the use of charts of normal uterine height and waist measurements.
mesh_terms: D000005:Abdomen / Q000033:anatomy & histology*; D005260:Female; D005317:Fetal Growth Retardation / Q000175:diagnosis; D005865:Gestational Age; D006801:Humans; D006831:Polyhydramnios / Q000175:diagnosis; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011296:Prenatal Diagnosis; D012016:Reference Values; D012189:Retrospective Studies; D014427:Twins; D014463:Ultrasonography; D014599:Uterus / Q000033:anatomy & histology*