[Spontaneous abortion of one twin and later spontaneous delivery of the surviving twin].

The authors report a case of a diamnial-dictorial pregnancy with spontaneous abortion of the first foetus and late spontaneous delivery of the second twin. The intra-uterine death of the first foetus was diagnosed by sonography in the 16th week of pregnancy. The intra-uterine development of the second twin was normal and the spontaneous delivery was in the 32. week of gestation. As conclusion the authors recommend diagnosis of twin pregnancy with distinction between monochorial and dictorial placenta should be made by sonography as early as possible.