Contraceptive use in women may increase the risk of blood clot. Experts study indicates, the use of non-oral hormonal contraceptives like the patch, implants and vaginal rings may cause a higher risk of blood clot (known as venous thromboembolism) than oral contraceptives.
Several previous studies indicate a risk of venous thrombosis (collective form of deep vein thrombosis and pulmonary embolism) in women who use birth control pills or oral contraceptives. But, there are still very few studies that look at the risk of non-oral hormonal contraceptives.
In his study, Professor Ojvind Lidegaard of University of Copenhagen Denmark and his team examined a variety of research data related to the use of non-oral hormonal contraceptives to the risk of venous thrombosis in non-pregnant women (15-49 years) in Denmark during 2001-2010. All women involved in the study had no history of either blood clots or cancer before the study began. Several factors can affect the results of these findings, such as age and education level.
