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已明确肯定,死胎和新生儿体重减轻的相对危险度与孕期内母亲每天吸烟支数相关。曾有人报道成人患癌症危险度增高与其胚胎期或儿童期暴露于烟草相关。动物实验证实,烟草冷凝液是能透过胎盘的致癌原。作者则研究孕妇吸烟对胎儿的效应,本文报道孕妇每天吸烟支数与下一代患癌症危险度的关系。
It has been clearly affirmed that the relative risk of weight loss in stillbirths and newborns correlates with the number of cigarettes smoked per day during pregnancy. It has been reported that increased risk of developing cancer in adults correlates with exposure to tobacco during their embryonic or childhood stages. Animal experiments confirmed that tobacco condensate is carcinogenic through the placenta. The authors studied the effect of smoking on the fetus in pregnant women and reported the relationship between the number of cigarettes smoked per day and the risk of developing cancer in the next generation.