RHOXF1 (Rhox homeobox family member 1) is an X-linked transcription factor that plays a critical role in male reproductive biology and germ cell development. RHOXF1 is selectively expressed in reproductive tissues, specifically in pachytene spermatocytes and round spermatids in adult testes, and in prespermatogonia during fetal testicular development 1. The protein functions as a sequence-specific DNA-binding transcription factor that regulates genes involved in spermatogenesis, including stress protection and cell survival pathways 2. RHOXF1 can regulate the promoter activity of DMRT1, a key transcription factor in spermatogenesis 3. Disease relevance is significant, as deleterious variants in RHOXF1 cause male infertility with oligozoospermia and azoospermia 3. Multiple mutations have been identified in infertile men, including missense variants that impair protein function and cellular localization 23. Beyond reproduction, RHOXF1 shows oncogenic properties by regulating BCL2 expression and promoting cancer cell survival 4. Clinically, RHOXF1 mutations represent a monogenic cause of male infertility, and intracytoplasmic sperm injection (ICSI) may benefit patients with RHOXF1-associated oligozoospermia 3.