Progesteron

Progesterone (P4) is a steroid hormone primarily involved in the menstrual cycle, pregnancy, and embryogenesis. It is synthesized in the ovaries, adrenal glands, and placenta, playing a crucial role in preparing the endometrium for implantation and maintaining pregnancy. Researchers have observed that progesterone modulates estrogen receptor activity, particularly in breast cancer, where it serves as a prognostic biomarker. Clinically, progesterone levels are significant in assessing reproductive health, with variations indicating conditions such as luteal phase defects, ovarian cysts, or adrenal hyperplasia. In neonatal health, progesterone withdrawal can lead to neonatal menstruation, a phenomenon linked to fetal distress. For athletes and biohackers, progesterone's influence on mood, energy, and muscle recovery is of interest, though its direct impact on performance is less clear. Researchers found that time-of-day and menstrual cycle phase can affect progesterone levels, necessitating standardized testing conditions. Confounders include hormonal contraceptives and certain medications that can alter progesterone metabolism.