Data for the study was collected from 2007 to 2008 and a total of 36 healthy primiparas aged 19-39 years completed the study.
Gagnaöflun fór fram á tímabilinu 2007 til 2008. Alls luku 36 heilbrigðar frumbyrjur á aldrinum 19-39 ára þátttöku í rannsókninni.