ABSTRACT
Ultrasound is particularly useful to record fetal demise. A twin fetus may die at any stage of pregnancy. If this is early in the first trimester the resultant empty sac will be completely reabsorbed, and the prognosis of the remaining fetus is excellent (see Chapter 17). On the other hand, if the fetus dies later in gestation in the second trimester, a fetus papyraceous may be identified at delivery. Whether
this should be registered as a stillbirth or not is debatable, and will vary from country to country. Spastic forms of cerebral palsy are increased in multiple pregnancy, in particular if one twin dies in utero6, and might be related to single fetal demise at any stage of pregnancy (see Chapter 97).
