Smoking is no doubt harmful for health but if you smoke during pregnancy then it may prove harmful for your baby too who is growing inside your womb, a new study has come up with this revelation. This study roofed about 566 infants with congenital heart defect (CHD) and about 491 infants without CHD along with their parents and popped out the fact that the women who smoked during pregnancy their infants had 60 percent higher chances of CHD. This study further revealed that passive smoking also plays a major role in soaring up the chances of CHD in infants. So, as a conclusion it would be right saying that smoking whether it is in direct way or indirect way may tell upon the health of your infant. So always mind it.