HPC 250 mg, which stands for Hydroxyprogesterone Caproate 250 milligrams, is a synthetic form of the hormone progesterone used primarily in obstetric and gynecological care. It is commonly prescribed to reduce the risk of preterm birth in women with a history of previous preterm deliveries. By supplementing progesterone levels, HPC supports the uterus and helps sustain pregnancy to term. It may also be used in other hormonal therapies to manage conditions linked to progesterone deficiency. The medication is administered as an intramuscular injection, typically on a weekly schedule under medical supervision.