Frequency of twin births in Santa Maria-Frequency of twin births at the University Hospital in the period of 1985-1995
DOI:
https://doi.org/10.5902/2179460X26752Abstract
The frequency of twin births was established at Santa Maria's University Hospital in the period from 1985 through 1995, when 253 double gestations (1,58%) and 6 triple gestations (0,037%) occurred, in a total of 16006 pregnancies. With the use of Weimberg's method , corrected by James, a frequency of 44,75% of dizygotic and therefore 55,25% of monozygotic twins pairs was found. The sex ratio showed that there were 85,82 males to 100 females among the twins, result that differed significantly of the sex ratio in single pregnancies, where 103,89 males to 100 females occurred. These results are compared with those found in other populations.
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