During preconception and pregnancy, insufficient luteal phase function becomes a crucial consideration. Understanding when and how to supplement progesterone, and when to cease, is paramount for miscarriage prevention and fetal health. Prompt progesterone supplementation after ovulation, with adjustments based on individual differences, is advised. Individuals with a history of miscarriage should closely monitor their ovulation cycles and promptly supplement progesterone to enhance successful implantation. As the placenta develops, gradually reducing exogenous progesterone is typically recommended, usually stopping around the third month of pregnancy. Scientifically sound supplementation is vital for miscarriage prevention and fostering the healthy development of the fetus.#Maintainingpregnancy #recurrentmiscarriage #progesteronesupplementationforpregnancyprotection