Despite advances in neonatal medicine, the mortality rate for congenit
al diaphragmatic hernia remains high. The results of work in animal mo
dels suggest that this anomaly may be amenable to in utero surgical co
rrection. In this article, the natural history of congenital diaphragm
atic hernia in humans is reviewed, and the development of antenatal ma
nagement strategies is traced. The ethical issues surrounding the mana
gement of fetuses with diaphragmatic hernias are also discussed. The g
round-breaking nature of the development of strategies for management
of congenital diaphragmatic hernia underscores the importance of estab
lishing scientific and ethical guidelines for future endeavors with in
utero therapy.