| Determination of chorionicity in twin gestations by high-frequencyabdominal ultrasonography: Counting the layers of the dividing membrane |
Vayssiere, C.F.;Heim, N.;Camus, E.P.;Hillion, Y.E.;Nisand, I.F.; |
American Journal of Obstetrics and Gynecology |
1996-12-01 |
查看 |
