<p>Background: The identification of c-type natriuretic peptide (CNP) as a key upstream regulator of cyclic GMP (cGMP) levels has paved the way for innova-tive in vitro maturation (IVM) techniques, the so-called biphasic CAPA-IVM (capacitation IVM) approach. This method uses CNP to prevent early meiosis progression and has demonstrated enhanced oocyte maturation rates. This report highlights the successful use of the CAPA-IVM method in Indonesia.&nbsp;<br /> Case Presentation: Immature cumulus-oocyte complexes (COCs) were successfully retrieved from an infertile woman aged 37 years without prior ovarian stimulation. The obtained COCs were incubated in CAPA medium for 24 <em>hr</em> and then transferred to a maturation medium containing amphiregulin, insulin, human serum albumin, and recombinant FSH. After 30 <em>hr</em>, all immature oocytes reached the metaphase II (MII) stage, as evidenced by the first polar body extrusion and confirmed through spindle formation.&nbsp;<br /> Conclusion: CAPA-IVM system enabled all retrieved immature oocytes to reach the MII stage without prior ovarian stimulation. This finding supports its feasibility as a simplified IVF approach with the potential to reduce treatment costs, particularly in resource-limited settings. However, further clinical evalua-tion is required to confirm its effectiveness.</p>