AN ACARDIUS AMORPHUS IN A TRIPLET PREGNANCY

Antenatal diagnosis of acardiac, acephalic twin

A case of acardiac, acephalic twin diagnosed by antenatal ultrasound is reported. The obstetrical significance of this condition is discussed.

A note on the epidemiology of acardiac monsters

The literature on acardiac monsters has been reviewed. The following conclusions were drawn: 1. The probability of their appearance seems considerably higher among monoamniotic than diamniotic monochorionic twin pairs. 2. They seem more likely to occur within monozygotic (MZ) pairs in higher multiple births than in MZ twins. 3. The data are consistent with the suggestion that there is a slight female excess among them.