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Thirty-one genetic amniocenteses involving multiple gestations were performed in the genetics unit between 1976 and 1982. Three sets of triplets were included. Precise locations of the sacs were determined using real-time ultrasonography and successful sampling of all sacs was accomplished. Spontaneous abortions occurred in two normal twins and one normal triplet gestation. Two therapeutic abortions were performed for fetal abnormalities. Two cases of discordance for trisomy 21 (one twin and one triplet) were allowed to continue; the twin case terminated at 25 weeks' gestation with neonatal deaths and the triplets are alive and well.

During the course of a prolonged investigation of experimental pneumonia, a red blood cell count was made as a routine procedure. Our first thought was that there would be a compensatory rise in the number of erythrocytes to counteract t h e effect of interference with blood oxidative processes in the lung as a result of the pneumoni¢ lesions. We found otherwise.In the work on pneumonia some 60 dogs were employed. Of these, 36 were studied for changes taking place in the blood.

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