NT-Natal 500 Injection contains Hydroxyprogesterone 500mg, a synthetic progestogen used primarily for the prevention of preterm birth in pregnant women with a history of spontaneous preterm delivery. Hydroxyprogesterone exerts its pharmacological effect by mimicking the natural hormone progesterone, which plays a critical role in maintaining pregnancy by promoting uterine quiescence and modulating the immune response to prevent fetal rejection. NT-Natal 500 is administered via intramuscular injection, typically once weekly, starting from the second trimester until 36 weeks of gestation or delivery, whichever occurs first. This therapeutic intervention has been shown to reduce the incidence of early labor and improve neonatal outcomes by decreasing the risk of complications associated with prematurity. The injection should be used under strict medical supervision, with careful consideration of contraindications such as active thrombophlebitis, liver dysfunction, or known hypersensitivity to progestogens. Common side effects may include injection site reactions, mild gastrointestinal disturbances, and fluid retention. NT-Natal 500 Injection represents a valuable option in obstetric care for high-risk pregnancies, contributing to the prolongation of gestation and enhancement of perinatal health. Proper patient selection and adherence to dosing guidelines are essential to maximize therapeutic benefits and minimize adverse effects.