HOXA11 is a sequence-specific transcription factor that functions as a developmental regulator controlling anterior-posterior positional identity and skeletal system development 1. In the reproductive tract, HOXA11 is dynamically regulated by estrogen and progesterone, with peak expression during the secretory phase of the menstrual cycle 12. Notably, HOXA11 expression is dramatically downregulated in glandular epithelium during the midsecretory phase, which is essential for endometrial differentiation and receptivity 2. HOXA11 orchestrates implantation through multiple mechanisms, including modulation of extracellular matrix remodeling via metalloproteinases, cytokine signaling, and cell adhesion molecules such as β3-integrin 1. In gastric cancer, HOXA11 functions as a tumor suppressor gene that is frequently silenced through promoter hypermethylation in 81.25% of primary cases 3. HOXA11 promoter methylation status serves as a significant prognostic marker, with methylated HOXA11 associated with reduced survival (HR = 2.4) 4. Restoration of HOXA11 expression reduces gastric cancer cell proliferation, invasion, and migration by inhibiting Wnt signaling through upregulation of NKD1 3. Additionally, HOXA11-AS, an antisense long non-coding RNA derived from this locus, functions through epigenetic mechanisms as both oncogenic and tumor-suppressive RNA in various cancers 5. These findings establish HOXA11 as a critical developmental regulator with important roles in reproductive health and cancer biology.