What does progesterone P mean?

Progestin 70 is progesterone, mainly a hormone secreted by the ovary, P is the abbreviation of progesterone. If there is no pregnancy, progesterone is mainly secreted by the corpus luteum after ovulation. After pregnancy, progesterone is secreted by the corpus luteum in the early stage, and then there will generally be placenta to secrete progesterone. At different periods, progesterone standard values are different. For example, in the luteal phase, progesterone values will reach their peak. If there is insufficient luteal function of women, it is easy to lead to menstrual disorders, and after pregnancy may lead to threatened abortion.