Human herpes virus 6 (HHV6) DNA two of eight fetuses with hydrops and none
of ten non-hydropic dead fetuses. Both cases with HHV6 DNA had chromosomal
abnormalities. Positive results were confirmed with a second PCR specific f
or an alternate region of the HHV6 genome. Restriction endonuclease analysi
s confirmed that the viral DNA was representative of HHV6 type A.