[Twin deliveries (author's transl)].

The statistics on twin deliveries for Bavaria from 1920-1925 were compared to those for 1972-1976. The number of twin deliveries showed a reduction from 15 per thousand in 1920-1925 to 9 per thousand in 1972-1976. The largest number of twin mothers were young primigravidas or older multi-gravidas. The percentage of twins of the same sex increased by 4.7% for boys and 5.7% for girls. The percentage of twin deliveries of different sex decreased by about 7%. Of all twin deliveries in Bavaria from 1920-1976 66% were of the same sex and 34% had different sex.