Verrotti C, Caforio E, Gramellini, et al. D. Ultrasound screening in second and third trimester of pregnancy: an update. Acta Biomed [Internet]. 2007 Dec. 1 [cited 2026 Apr. 24];78(3):229-32. Available from: https://mattioli1885journals.com/index.php/actabiomedica/article/view/1908