Oestrogen therapy is a primary treatment for transgender women seeking feminisation. Traditional administration has often involved bi-weekly (every two weeks) or even monthly injections, which can lead to fluctuations in hormone levels, creating peaks and troughs. Research and clinical guidelines, including those from Boston University’s Practical Guidelines for Transgender Hormone Treatment, now suggest that weekly dosing may offer a more stable hormonal profile, leading to smoother feminisation, improved emotional stability, and potentially fewer unwanted side effects.
With standard bi-weekly or monthly oestrogen injections, the body can experience sharp peaks in estradiol levels immediately after injection, followed by rapid declines before the next dose. This inconsistency can lead to:
Inconsistent feminisation effects: Peaks may produce intense feminising changes, but troughs may slow or interrupt desired progress.
Emotional and physical side effects: Fluctuating oestrogen levels can contribute to mood swings, irritability, and physical symptoms such as hot flashes and fatigue.
Increased metabolic strain: Large doses administered less frequently require the liver to metabolise substantial hormone quantities in a short time, which may be taxing for some individuals.
Boston University’s Practical Guidelines for Transgender Hormone Treatment emphasise individualised care to optimise hormone therapy outcomes. They recommend weekly doses of oestrogen injections as a means to stabilise hormone levels more effectively. The guidelines suggest that consistent, moderate doses can reduce the frequency and intensity of hormone peaks and troughs, providing smoother hormonal transitions and supporting both physical and psychological well-being.
More Stable Oestrogen Levels: Weekly injections maintain a more consistent oestrogen level, avoiding the high peaks and low troughs typical of less frequent dosing.
Enhanced Feminisation: Stable hormone levels support continuous feminisation effects, aiding in consistent breast development, fat redistribution, and softening of skin texture.
Improved Mental Health and Emotional Stability: By avoiding drastic hormonal fluctuations, weekly dosing may help reduce mood swings and emotional distress, which are often associated with rapid shifts in oestrogen levels.
Lower Risk of Adverse Effects: Smaller, more frequent doses are easier for the body to process, reducing the strain on metabolic systems, particularly the liver.
Estradiol Valerate and Estradiol Cypionate are the two commonly used injectable estrogens. Both can be dosed weekly, but they differ slightly in their half-lives, meaning we may adjust the weekly dose based on the specific formulation.
Recommended Dosages: Weekly dosing typically involves a lower dose per injection than bi-weekly or monthly schedules. The precise dose will depend on individual goals, baseline hormone levels, and responses, but generally falls between 5-10 mg per week of estradiol valerate or cypionate. Adjustments may be necessary based on blood test results and clinical assessments.
Weekly injections can be administered in a clinical setting or as self-injections, depending on individual preference and comfort level. Many transgender women find self-injection a convenient option, as it allows flexibility and consistency with the weekly schedule. You can book an Injection Training Session with one of our Nurses if you would prefer.
Serum Estradiol and Testosterone Levels: Regular blood tests are essential to monitor estradiol levels, with a goal of maintaining levels within a feminising range without reaching supra-physiological peaks. You can find out more about what blood tests you need to get done and how you can get them done here.
Symptom Tracking: Patients are encouraged to track physical changes, emotional responses, and any adverse effects. This feedback helps us fine-tune dosages and adjust frequency if needed.
Frequent injections may increase the risk of mild irritation or soreness at the injection site. Rotating injection sites can help, and your healthcare provider can guide you on safe injection techniques. You can find more information around injection reactions on our Knowledge base. For example, Bleeding After an Injection and Lumps and Lumpiness After Injections.
Weekly dosing requires more frequent supply, which may increase costs or require more refills. However, some pharmacies or Independent Prescribers prices can differ from one another and one may offer more affordable access to injectable oestrogen, and many insurance plans now cover gender-affirming hormone therapy.
Clinical evidence and patient feedback indicate that weekly dosing is associated with:
Higher Patient Satisfaction: Many transgender women report feeling more balanced, emotionally stable, and satisfied with their feminisation progress on weekly injections.
Improved Adherence: Regular weekly doses that avoid the “roller-coaster” effect may encourage consistent use, as patients feel more aligned with their goals.
Greater Physical Comfort: Reduced fluctuations can help minimise uncomfortable symptoms like hot flashes and may lead to a more comfortable experience of the feminisation process.
Switching to weekly oestrogen injections provides a promising approach for transgender women seeking steady and continuous feminisation. Boston University’s Practical Guidelines for Transgender Hormone Treatment support this regimen as a method to reduce peaks and troughs, ultimately offering a more stable, positive experience. This strategy aligns with a growing body of evidence that personalised, consistent hormone therapy improves both physical and mental outcomes for transgender patients.
Women considering weekly dosing should consult with us to assess personal goals, access to treatment, and medical needs, ensuring the most effective and satisfying approach to their gender-affirming journey. You can do this by booking a Quick Chat Session to discuss your goals or you can book a Nurse or Doctor Consultation to discuss the best medical/medication options for you.