Diagnosing amnionicity at 6 weeks of pregnancy with transvaginal three-dimensional ultrasonography: case report
Babinszki A, Mukherjee T, Kerenyi T, Berkowitz RL, Copperman AB.
Diagnosing amnionicity at 6 weeks of pregnancy with transvaginal three-dimensional ultrasonography: case report.
Fertil Steril 1999; 71:1161-4.