Nestoron is primarily used in the field of reproductive health as a progestin component in hormonal contraceptives. It is specifically formulated for use in long-acting reversible contraceptive methods, such as subdermal implants. These implants provide effective pregnancy prevention for an extended period, typically up to several years, by steadily releasing the hormone into the bloodstream. Nestoron works by inhibiting ovulation, thickening cervical mucus to prevent sperm entry, and altering the endometrial lining to reduce the likelihood of implantation. Its high efficacy, convenience, and minimal user intervention make it a popular choice for individuals seeking reliable and low-maintenance birth control options. Additionally, it is often favored for its favorable safety profile and lower risk of systemic side effects compared to some other progestins.