most sensitive phase in embryonic development is before the first cell division,
i.e., during the first hours after fertilisation. In this period an all or
nothing rule holds, i.e., the fertilised egg either survives without damage or
is aborted. A possible increase of spontaneous abortions will lead to a decrease
of live births 9 months after exposure.
As mentioned above, Bavaria was the German region with highest fallout. The figure below shows continuous measurements of the activity in air 1 meter above ground in the Munich based GSF Institute. Immediately after the Chernobyl accident the activity rose from 8 ÁR/h to about 110 ÁR/h.
Gamma dose rate in the air during May 1986
in Munich, Germany. In the first days of May it reached about 110 ÁR/h, more
than 10-times the normal level of 8 ÁR/h.
Deviations of the monthly number of live births plus stillbirths from the long-term trend in southern Bavaria. The broken lines indicate the 2σ-range.