Table 2.

Common clinical scenarios of hormone-related VTE and key clinical considerations

Clinical settingKey clinical considerationsFurther reading
Hormonal contraceptives • after start of anticoagulant therapy, the risk of abnormal uterine bleeding/heavy menstrual bleeding is high, and cessation of hormonal contraceptives likely further increases bleeding
• need for adequate contraception during oral anticoagulant treatment
• indications for use not only include prevention of pregnancy but may also include polycystic ovary syndrome, abnormal uterine bleeding, and endometriosis
• indication for thromboprophylaxis in future pregnancy 
1,34  
Assisted reproductive technology • desire for parenthood is central for many patients 18  
Pregnancy and postpartum period • manage health of both mother and unborn child/newborn
• low-molecular-weight heparins are the first choice of treatment during pregnancy; very common side effects include bruising and skin allergies
• for the prevention and management of VTE, DOACs and VKAsa are contraindicated during pregnancy due to concerns for the unborn child
• challenges of anticoagulant management around delivery and neuraxial anesthesia
• some anticoagulants are contraindicated during breastfeeding
• consequences for thromboprophylaxis in future pregnancy 
18  
Hormone replacement therapy • indications for use are generally well-being and quality of life 34  
Gender-affirming therapy • indication for use is crucial for well-being and quality of life 35  
Hormone therapy in oncology • likely has an impact on the oncological management plan and prognosis 36  
Clinical settingKey clinical considerationsFurther reading
Hormonal contraceptives • after start of anticoagulant therapy, the risk of abnormal uterine bleeding/heavy menstrual bleeding is high, and cessation of hormonal contraceptives likely further increases bleeding
• need for adequate contraception during oral anticoagulant treatment
• indications for use not only include prevention of pregnancy but may also include polycystic ovary syndrome, abnormal uterine bleeding, and endometriosis
• indication for thromboprophylaxis in future pregnancy 
1,34  
Assisted reproductive technology • desire for parenthood is central for many patients 18  
Pregnancy and postpartum period • manage health of both mother and unborn child/newborn
• low-molecular-weight heparins are the first choice of treatment during pregnancy; very common side effects include bruising and skin allergies
• for the prevention and management of VTE, DOACs and VKAsa are contraindicated during pregnancy due to concerns for the unborn child
• challenges of anticoagulant management around delivery and neuraxial anesthesia
• some anticoagulants are contraindicated during breastfeeding
• consequences for thromboprophylaxis in future pregnancy 
18  
Hormone replacement therapy • indications for use are generally well-being and quality of life 34  
Gender-affirming therapy • indication for use is crucial for well-being and quality of life 35  
Hormone therapy in oncology • likely has an impact on the oncological management plan and prognosis 36  
a

VKAs are considered on a case-by-case basis during pregnancy in women with mechanical heart valves and high thrombotic risk.

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