Affect to Pregnant women. Pregnant women smoking will cause increased body weight during pregnancy is less than normal, and there is a chance the abortion, premature birth, and postpartum hemorrhage during a woman's pregnancy, the only two non-smoking. It also has a low placenta placenta Ko ROK early child birth from the mother, the greater the weight, and smoking may have a length less than normal. Slower-than-normal brain development might be nervous system disorders. Memory system.