Progesterone injection is a medication used to support and stabilize early pregnancy, especially in women whose bodies are not producing enough natural progesterone. Progesterone is the hormone that prepares and maintains the uterine lining, making it thick, healthy, and ready for an embryo to implant. Without enough progesterone, the lining can break down, leading to early bleeding or miscarriage. Doctors commonly prescribe progesterone injections for women who experience recurrent miscarriages

Preparing and Administering Progesterone in Oil® Fertility Treatment