Intrauterine demise of two fetuses in an unsuspected triplet pregnancy. A case report.

Triplet pregnancy is an uncommon event. The chance that one or more fetuses will suffer intrauterine death in such a pregnancy is one in six, yet the mechanism of those fetal deaths is poorly understood. This paper reports on the delivery of a surviving triplet after the demise, many weeks apart, of the other two fetuses in an unrecognized triplet pregnancy.