“…Using the definition of MB by Pitt (1968Pitt ( , 1973, the prevalence of MB in our study is 13.1% (core MB Group). In reports from European countries and the USA, the prevalence rates of MB have varied from 10% to 70%, and the prevalence can be remarkably high (Aguado, Moreno, & Palacio, 1996;Cox, Connor, & Kendell, 1982;Dalton, 1971;Kumar & Robson, 1984;Nagata et al, 2000;Rondon, 2003;Yamashita, Yoshida, Nakano, & Tashiro, 2000). Studies on postnatal depression, which is a later, more prolonged and more serious condition than the transient experience of MB, showed a prevalence of 10 -15% (Cooper & Murray, 1995, 1998Cox et al, 1987;Harris, Huckle, Thomas, Johns, & Fung, 1989;Kumar & Robson, 1984;O'Hara & Swain, 1996).…”