Add yet another health related problem attributed to smoking: women who smoke reduce their chances of becoming pregnant via in-vitro fertilization (IVF) the equivalent of aging them 10 years. The results were found in a study published today in the journal 'Human Reproduction.' It means that a 20-year-old smoker has the success rate at IVF of a 30-year-old nonsmoker.

The study also found that women who were overweight had a 33 percent lower chance of having success in their first IVF than women who were not overweight.

The study followed the IVF success rate of 8,457 women after their first IVF attempt. It then examined the lifestyle factors of the women to find a relationship between those lifestyle factors and successful IVF pregnancies.

The conclusion was that women who are trying to get pregnant should stop smoking and lose weight if they are overweight. The reason that smokers had difficulty conceiving through IVF was not determined by the study.