[Recommendations for a medical-meteorologic prognosis for hemophilia].

A one year lasting study about the relation between bleedings in haemophiliacs and weather was performed. There had been included 1802 bleeding events. The influence of meteorologic factors to bleeding was proved. The influx of warm air proved inopportune. The decrease in atmospheric pressure as well as winter cold fronts lead to increase of bleeding tendency. Haemophiliacs should avoid physical and psychical stress in such unconvenient atmospheric situations. The replacement therapy should be adapted to the weather situation.