Although many people still conceive successfully even when smoking 20 cigarettes daily, in the majority of cases where fertility problems exist under smokers, by stopping their fertility will increase. Research has indicated that overweight and underweight smokers are more likely to take longer to conceive than most couples where none of the partners smoke. If you are planning a pregnancy it may take three months or longer for the body to restore the balance required for successful conception. Men that are smoking in general have a lower sperm count than non-smokers. Smoking may even affect the shape of the sperm and hinder its motility. In addition smoking often lead to blood vessel problems to the penis which may hinder erections. Smoking can hinder the production of hormones required for pregnancy. As such a person needs to stop smoking to improve fertility.