1. Echographic and anatomic studies of the maternotrophoblastic border during the first trimester of pregnancy;Hustin;Am J Obstet Gynecol,1987
2. In vivo aspect of the maternaltrophoblastic border during the first trimester of gestation;Schaaps;Trophoblast Res,1988
3. Anatomical studies of the uteroplacental vascularization in the first trimester of pregnancy;Hustin;Trophoblast Res,1988
4. Placenta aging monitored by gray scale echography;Fisher;Am J Obstet Gynecol,1976
5. The sonolucent placenta in highrisk obstetrics;Haney;Obstet Gynecol,1980