Testing ovarian suppression with a hormone injection in premenopausal breast cancer

This trial is testing ZOLADEX, a medication given by injection under the skin, to see how well it suppresses the hormones your ovaries produce. The study focuses on premenopausal women (those still having periods) with advanced breast cancer that is sensitive to hormones. Researchers want to measure whether and how consistently this medication achieves ovarian suppression by checking hormone levels throughout the treatment period.

In premenopausal women with hormone-sensitive breast cancer, suppressing ovarian hormones is an important part of treatment. This trial aims to confirm that this medication reliably achieves that suppression, which could help doctors better manage advanced breast cancer in younger women.