Invasive intrauterine procedures in twin pregnancies discordant for fetal malformation.

Invasive intrauterine procedures in two twin pregnancies for exencephaly and multiple malformations are reported. In the first case, to ensure the development of the normal fetus, selective feticide of the affected fetus was undertaken by transabdominal intracardial injection of 20% NaCl solution. A healthy newborn infant with normal weight and a fetus papyraceus were delivered at term. In the second case, because of monoamnial placentation, the procedure was regarded too dangerous, therefore, only therapeutic amniocentesis was carried out to decrease the volume of amniotic fluid. The fetuses were delivered in the preterm period. The advantages of the procedure of selective feticide developed by the authors are also discussed.