Arif AA, et al. - In this study including parents/guardians of children with and without asthma visiting a charity hospital, researchers used univariable and multiple stepwise logistic regression analysis to assess the association of maternal complications during pregnancy and prenatal exposures with childhood asthma among low-income families in Karachi, Pakistan. The factors that were found to cause increased odds of childhood asthma included maternal symptoms of nocturnal cough during pregnancy (posed significant risk), family history of asthma or hay fever. Remarkably elevated odds of asthma were observed among children whose mothers received prenatal care by Dai, an unskilled health worker. Prenatal exposure to rats/mice and contact with goats while pregnant were the factors that showed significant relation to childhood asthma. Reduced odds of childhood asthma were observed in relation to prenatal exposure to cows/cattle.