2Pistorius LR, Stoutenbeek P, Groenendaal F, et al. Grade and symmetry of normal fetal cortical development: a longitudinal two- and three-dimensional ultrasound study [J]. Ultrasound Obstet Gynecol, 2010,36(6) 700-708.
3Alonso I,Borenstein M,Grant G, et al.Depth of brain fissures in normal fetuses by prenatal ultrasound between 19 and 30 weeksof gestation[J]. Ultrasound Obstet Gynecol, 2010,36 (6) : 693- 699.
4Rolo LC, Araujo ]Onior E, Nardozza LM, etal. Development of fetal brain sulci and gyri: assessment through two and three- dimensional ultrasound and magnetic resonance imaging[J].Arch Gynecol Obstet,2011,283(2) : 149-158.
5Mittal P, Gonalves LF, Kusanovic JP, et al. Objective evaluation of sylvian fissure development by multiplanar 3-dimensional ultrasonography[J].J Ultrasound Med, 2007,26 (3) : 347-353.
6Zhang Z, Liu S, Lin X, et al. Development of fetal brain 0f 20 weeks gestational age: assessment with post-mortem Magnetic Resonance Imaging[J].Eur J Radiol,2011,80(3) :e432-439.
7Moreira NC,Teixeira J, Themudo R, et al.Measurements of the normal fetal brain at gestation weeks 17 to 23:a MRI study[J]. Neuroradiol.ogy, 201 1,53(1) :43-48.
8Toi A,Lister WS, Fong KW. How early are fetal eerebral sulci visible at prenatal ultrasourtd and what is the normal pattern of early fetal suleal development? [J] Ultrasound Obstet Gynecol, 2004,24(7) :706-715.
9Perkins L, Hughes E, Srinivasan L, et al. Exploring cortical subplate evolution using magnetic resonance imaging of the fetalbrain[J].Dev Neurosci,2008,30(l-3) :211-220.
10Zhang Z, Liu S, Lin X, et al.Development of laminar organization of the fetal cerebrum at 3.0T and 7.0T: a postmortem MRI study [J].Neuroradiology,2011,53(3) : 177-184.
