Which of the following is a common risk factor associated with pregnancy in relation to PE?

• A. Chronic Hypertension
• B. Pregnancy/Birth Control
• C. Obstructive Sleep Apnea
• D. Diabetes Mellitus

Answer: (B)

Pregnancy and the use of hormonal birth control are both significant risk factors for the development of pulmonary embolism (PE). In pregnancy, the physiological changes that occur, such as increased blood volume, heightened levels of clotting factors, and the compression of pelvic blood vessels by the enlarging uterus, contribute to a hypercoagulable state. This state increases the likelihood of thrombus formation, which can subsequently lead to PE if a thrombus dislodges and travels to the pulmonary arteries.

Hormonal birth control, similarly, can also increase clotting risk due to the estrogen component, which enhances coagulation. Estrogens promote the synthesis of various clotting factors, which can elevate the risk of venous thromboembolism. When considering risk factors for PE, both pregnancy and hormonal contraception are critical areas to examine, as they intertwine in their contributions to an increased risk of developing thromboembolic events.

Other options such as chronic hypertension, obstructive sleep apnea, and diabetes mellitus, while they can pose individual health concerns, are not as directly linked to the risk of PE in the context of pregnancy or the use of hormonal therapy as pregnancy and birth control are. Chronic hypertension may contribute to cardiovascular issues more generally but does not provide the