Boys born by forceps and vacuum extraction examined at 18 years of age

Nilsen ST

1984

Bergen, Norway

An 18 year follow up study of 62 males delivered by forceps and 38 by vacuum extraction in 1962-63. A significantly elevated mean intelligence score was found in the forceps group, while the vacuum group did not differ from the national average.

This study is much smaller than a similar Israeli study. See entry 001 and 003