[Changes in endometrial vascularisation due to hormone therapy in menopause]

Area of Science:

• Gynecology
• Reproductive Endocrinology
• Vascular Biology

Background:

• Hormone replacement therapy (HRT) is commonly used to manage menopausal symptoms.
• Understanding endometrial changes during HRT is crucial for safety and efficacy.
• The role of progestogens in HRT-induced endometrial vascularization requires further investigation.

Purpose of the Study:

• To investigate endometrial microvascular changes in menopausal women undergoing sequential and continuous combined HRT.
• To compare these changes with pre-therapy or untreated controls.
• To analyze the influence of progestogen type, dose, and duration on endometrial neoangiogenesis.

Main Methods:

• Hysteroscopic and histopathologic examination of endometrial tissue.
• Immunohistochemical techniques to assess microvascular networks.
• Comparison of HRT groups (sequential and continuous combined) with a control group.

Main Results:

• HRT induced significant changes in the endometrial microvascular network, including new blood vessel formation and hemorrhages.
• Endometrial neoangiogenesis varied based on progestogen type, dose, and treatment duration.
• Vascular changes were more pronounced in the first year of HRT and correlated with secretory and atrophic endometrium.

Conclusions:

• HRT significantly impacts endometrial vascularity, with variations dependent on progestogen characteristics.
• The findings highlight the dynamic nature of endometrial adaptation to HRT.
• Further research into progestogen-specific effects on endometrial vasculature is warranted.