This book provides an insight into contemporary views on smoking and drinking of alcohol and caffeine as well as a general attitude towards healthy lifestyle during pregnancy. It summarizes different views of national and international scholars regarding smoking and drinking of alcohol and caffeine in pregnancy and the effects it has on the foetus. It draws on a large body of evidence in research and highlights various factors that influence pregnant women to continue with their habit. We see the significance of partners in influencing pregnant women in the use of cigarette and alcohol. Those influences are friends, family and craving for alcohol. This study has indicated that pregnant women acknowledge information about living a healthy life during pregnancy and they also acknowledge the effects of smoking and drinking on pregnancy and foetus but are unable to desist from the act.