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Published online by Cambridge University Press: 01 August 2014
A total of 26 healthy full-term infants from multiple pregnancies and a control group of 96 infants from single pregnancies, all from the Rzeszow district, were tested. Blood was taken from cranial veins at the first, third, and sixth day of life, always at the same time. All infants were kept under the same conditions. The results of the investigation show that (a) twin infants have lower values of peripheral blood than singleton infants in their first six days after delivery, and (b) the second twin has higher values of peripheral blood as compared with the first one.