"The present study considers data on all pregnancies that ended in a stillbirth or live birth in a rural area of Bangladesh during the years 1982 to 1984.  It considers the relationships of both biological and socio-economic factors to perinatal mortality....[Results show a] lack of association with any measure of socio-economic status.... Our study has confirmed that survival of the perinatal period is separately related to both maternal age and primiparity.  Once maternal age is taken into account, high parity shows no evidence of decreasing survival chances."