父母亲都吸烟的儿童,在出生前就象出生后生活在一个有大量有害物质如烟雾、毒物、一氧化碳及氰化物等污染的大气层中一样,在子宫内就可能接触到这样或那样的有害物质。关于母亲吸烟对胎儿产生不良影响的报告很多,其中包括生长发育障碍、突发性产前出血、产程延长、早产、围产期死亡等。然而,也有报告说,母亲吸烟的儿童,其新生儿呼吸窘迫综合征的发生率实际上是较低的。有的作者提出,吸烟有促进肺脏成熟的作用,这显然需要进一步调查证实。无论如何,母亲在妊娠期间大量吸烟,对胎儿是十分危险的,即使在新生儿期不死,许多预后不良的疾病,包括婴儿猝死综 Children who smoke both their parents and mothers, just as they were born, live in a polluted atmosphere with a large amount of harmful substances such as smoke, poisons, carbon monoxide and cyanide, which may come into contact with one or the other of the harmful substances . There are a lot of reports on the adverse effects of maternal smoking on the fetus, including growth and development disorders, sudden prenatal bleeding, prolonged labor, premature birth and perinatal death. However, there are also reports that the incidence of neonatal respiratory distress syndrome is actually lower in mothers smokers. Some authors suggest that smoking can promote lung maturation, which obviously needs further investigation confirmed. In any case, mothers smoking heavily during pregnancy are very dangerous to the fetus, and even in the neonatal period, many diseases with poor prognosis, including sudden infant death