Hormone therapy is a medical treatment used to regulate, supplement, or influence the body’s natural hormone activity. It plays a role in a wide range of conditions, from endocrine imbalances to menopause, and is defined by how hormones are introduced, adjusted, or blocked within the body.
What Is Hormone Therapy?
According to the National Cancer Institute, hormone therapy is a:
“Treatment that adds, blocks, or removes hormones. For certain conditions (such as diabetes or menopause), hormones are given to adjust low hormone levels. Hormones can cause certain cancers (such as prostate and breast cancer) to grow. To slow or stop the growth of cancer, synthetic hormones or other drugs may be given to block the body’s natural hormones. Sometimes surgery is needed to remove the gland that makes a certain hormone. Also called endocrine therapy, hormonal therapy, and hormone treatment.”
This definition highlights the dual role of hormones in the body—both as essential regulators and, in some cases, as contributors to disease progression. As a result, hormone therapy may involve either supplementing hormones or limiting their effects, depending on the clinical objective.
Estrogen Therapy in Menopause
During menopause, the body produces less estrogen, which can lead to a range of physiological changes. Estrogen therapy is one of the most commonly used approaches to help manage these changes, particularly in women who have undergone a hysterectomy.
According to WebMD, estrogen therapy is available in multiple forms, each delivering hormones through a different method of absorption.
Common Forms of Estrogen Therapy
Estrogen Pills (Oral Therapy)
Oral estrogen is the most commonly used treatment for menopausal symptoms. These medications are typically taken once daily and include forms such as conjugated estrogens and estradiol-based therapies. Estradiol is chemically identical to the estrogen naturally produced by the ovaries prior to menopause. Some formulations also combine estrogen with progestin, depending on patient needs.
Estrogen Patches (Transdermal Therapy)
Estrogen patches are applied directly to the skin, usually on the abdomen, and deliver hormones steadily into the bloodstream. Depending on the formulation, patches may be replaced every few days or once per week. Combination patches containing both estrogen and progestin are also available, while lower-dose patches may be used specifically for bone health.
Topical Estrogen (Gels, Creams, Sprays)
Topical estrogen therapies are absorbed through the skin and provide systemic hormone delivery. These include gels, creams, and sprays applied to areas such as the arms or legs. Application is typically performed once daily, though instructions vary by product.
Vaginal Estrogen (Localized Therapy)
Vaginal estrogen is used to treat localized symptoms such as dryness, irritation, or discomfort. These therapies are available as creams, tablets, or rings and are designed to act primarily at the site of application. Dosing schedules vary, with some products requiring daily use initially before transitioning to maintenance use.
Pellet Therapy and Delivery Method Considerations
In addition to oral, transdermal, topical, and localized therapies, hormone delivery can also be achieved through subcutaneous pellet therapy.
Pellet therapy involves placing small, solid hormone pellets beneath the skin, where they release hormones gradually over time. This method provides a continuous and consistent level of hormone delivery, rather than the peaks and fluctuations that can occur with daily or weekly dosing methods.
The procedure is performed using a trocar device, which creates a controlled pathway beneath the skin for accurate pellet placement. The design and size of the trocar play an important role in the procedure, influencing both technique and efficiency.
A Broader Clinical Perspective
Hormone therapy is not defined by a single delivery method. Instead, it includes a range of approaches—each with its own absorption pathway, dosing frequency, and clinical considerations.
Understanding these differences provides a more complete perspective on hormone therapy, including how delivery method and procedural technique contribute to overall consistency and outcomes.
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3.2mm Size Trocars
3.2mm trocar systems are used in pellet therapy procedures that require a more controlled and narrower insertion pathway. These devices are commonly associated with:
- Pellet volumes up to approximately 150 mg
- Use cases where a single insertion channel is sufficient
- Procedures that prioritize precision and incremental placement
This size is often selected when working within more controlled dosing parameters or when minimizing insertion width is a consideration.
4.5mm Size Trocars
4.5mm Trocar Devices are designed for procedures requiring a larger insertion channel and increased delivery capacity. These devices are commonly associated with:
- Pellet volumes up to approximately 200 mg
- Situations requiring multiple pellets or higher dosing protocols
- Improved procedural efficiency by reducing the need for repeated insertions
The larger diameter supports more efficient placement in higher-volume scenarios while maintaining controlled delivery.
Material and workflow considerations
In addition to size, device selection may also involve material and workflow preferences:
- Stainless Steel Disposable Trocar Kits are designed for single-use work flows, and other insertion and may include features such as refined tip geometry for tissue separation
- ABS Plastic Disposable Trocar Kits are used in single-use workflows and may support cost or operational considerations
- Reusable Trocar Sets require sterilization processes and may be integrated into practices with autoclave capabilities
Practices often maintain access to both 3.2mm and 4.5mm devices to accommodate varying patient needs, and may keep disposable kits available as backup to ensure procedural continuity