After intramuscular injection of progesterone injection generally two to three days progesterone will grow up, after the injection of progesterone will be rapidly absorbed, the blood half-life is only a few minutes, generally 2 to 6 hours blood concentration reaches the peak, with the drug two to three days blood progesterone will grow up. Progesterone is rapidly absorbed from the gastrointestinal tract after oral intake, and rapidly metabolized and inactivated in the liver, oral relative to the effect of no muscle injection, generally using injection to give the drug, intramuscular injection of progesterone is rapidly absorbed after the blood half-life of only a few minutes, with the drug 2 to 6 hours blood concentration peak, the effect can be maintained for 24 hours or so, generally every day, intramuscular injection of progesterone can be once. Progesterone is also known as progesterone, normally secreted by the ovary with biological activity, if the lack of progesterone will lead to irregular menstruation, preeclampsia, etc., you need to go to the hospital obstetrics and gynecology under the guidance of the doctor to regular use of drugs.