Pregnant women smoking hazards are as follows: 1, can increase the fetal mortality rate before and after birth and the incidence of congenital heart disease. 2, smoking during pregnancy, the children born after growing up grumpy, easy to impulsive. 3, easy to cause spontaneous abortion, fetal growth retardation and newborn low weight, etc. Mothers are advised not to smoke during pregnancy for the health of you and your child!