... study providing data on a previouslyunexplored Iranian populatio n supports the hypothesisthat advanced paternal age and a birth rank of higherthan 3 (that is, higher age of father at birth) are ... trimester and postnatal infection, labourand perinatal traumas, immigration, residenc y in urbanareas and so on [12,13], and paternal occupation andage [14]. Paternal age has been linked to schi ... 10:15http://www.annals-general-psychiatry.com/content/10/1/15Page 3 of 6PRIMARY RESEARCH Open AccessAdvanced paternal age is a risk factor forschizophrenia in IraniansMorteza Naserbakht1, Hamid-Reza Ahmadkhaniha2,3,4*,...