Research suggests that there may be an increased risk of developing Type 2 diabetes or heart disease in women who use the contraceptive pill over a prolonged period of time.
The study of 2,814 women by British and Finnish scientists showed that women using the oral pill have a reduced sensitivity to insulin, which has been shown to increase the risk of developing Type 2 diabetes. The research also found that they had slightly raised blood pressure and higher levels of fats such as cholesterol in their blood.
"This study is interesting," said Amanda Eden, Care Advisor at Diabetes UK.
"We already know that people are at an increased risk of developing Type 2 diabetes if they have a family history of diabetes, are overweight, have had gestational diabetes or have high blood pressure.
"Suggestions of a link to the Pill would benefit from further research. Women who may have concerns should speak to their GP before making any changes."