[Fluorescence microscopy on embryonic and fetal cell degeneration]

Fluorochromes (acridin orange, quinakrin, koriphosin, auramin) introduced into the embryonic or foetal blood stream induce in the normal areas of cell death an elective fluorescence, as attested by experiments carried out on chick and rat embryos and foetuses. This vital method may serve as an experimental model for investigations concerning the transfer from the mother to the embryo or foetus of teratogenic substances as well as of their persistance and distribution--under certain experimental conditions--within the organism of the embryo or foetus.