Progesterone

Proceedings of the National Academy of Sciences of the United States of America · 2025

Researchers found that the progesterone receptor (PR) is essential for preparing the uterus for embryo implantation. They observed that a protein called WT1 works alongside PR in uterine cells to help regulate this process, highlighting its importance in reproductive health.

• The progesterone receptor is crucial for uterine receptivity.
• WT1 is identified as a key partner of the progesterone receptor in the uterus.
• WT1 is specifically expressed in uterine stromal cells.

Molecular medicine (Cambridge, Mass.) · 2024

Researchers found that progesterone (P4) may help reduce the harmful effects of cigarette smoke on the lungs, which is important for people with chronic obstructive pulmonary disease (COPD). In experiments with mice, P4 treatment improved lung function and reduced inflammation and damage caused by smoke exposure.

• P4 treatment improved lung health in mice exposed to cigarette smoke.
• The treatment reduced inflammation and oxidative damage in the lungs.
• P4's protective effects are linked to specific biological pathways.

Proceedings of the National Academy of Sciences of the United States of America · 2024

Researchers found that inflammation at the interface between fetal and maternal cells can trigger labor by reducing the effectiveness of progesterone, a hormone that helps maintain pregnancy. They observed that this process is linked to the inactivation of progesterone in decidual stromal cells by a specific enzyme, suggesting a potential mechanism for how inflammation can lead to childbirth.

• Inflammation at the chorion-decidua interface can induce labor.
• Progesterone's ability to prevent labor is diminished during inflammation.
• The enzyme AKR1C1 plays a role in inactivating progesterone in decidual stromal cells.

Trends in endocrinology and metabolism: TEM · 2022

Researchers observed that there are multiple types of progesterone receptors located on cell membranes, which play a role in how the hormone progesterone affects the body. They discussed the potential clinical implications of having too many of these receptors and how they may influence health outcomes.

• There are various membrane-associated progesterone receptors (MAPRs) and membrane progestin receptors (mPRs).
• These receptors are involved in non-genomic actions of progesterone.
• The number of receptors may impact clinical health outcomes.

The Journal of steroid biochemistry and molecular biology · 2022

Researchers observed that the hormone progesterone plays a crucial role in maintaining pregnancy by preventing labor contractions. They found that the withdrawal of progesterone is essential for the onset of labor, and understanding this process is vital for ensuring healthy births.

• Progesterone helps keep the uterus calm during pregnancy.
• The withdrawal of progesterone triggers the start of labor.
• Understanding how this withdrawal occurs is important for healthy pregnancies.

The Journal of steroid biochemistry and molecular biology · 2022

Researchers observed that the corpus luteum in the ovaries is crucial for starting and maintaining pregnancy, leading to the discovery of the hormone progesterone in the 1930s. This hormone plays a key role in regulating pregnancy and has been the focus of extensive research over the decades.

• The corpus luteum is essential for establishing and maintaining pregnancy.
• Progesterone was first isolated and characterized in the 1930s.
• Research has provided insights into how progesterone controls various aspects of pregnancy.

Best practice & research. Clinical obstetrics & gynaecology · 2020

Researchers observed that progesterone plays a vital role in reproductive medicine, particularly in areas like pregnancy support and assisted reproductive technologies. They noted its historical significance and ongoing development, highlighting its benefits for women's health and future research opportunities.

• Progesterone is important for managing pregnancy and reproductive health.
• Its use is beneficial in cases of pregnancy loss and preterm birth.
• Research on progesterone continues to evolve, promising new insights and applications.

Best practice & research. Clinical obstetrics & gynaecology · 2020

Researchers observed that natural progesterone (P4) has distinct effects and safety compared to synthetic progestins, meaning they do not work the same way. P4 plays a crucial role in regulating menstrual cycles and supporting pregnancy by preparing the uterus for implantation and influencing various biological processes.

• Natural progesterone (P4) has a unique safety and efficacy profile compared to synthetic progestins.
• P4 binds to various receptors, leading to different effects in the body.
• P4 is essential for regulating menstrual cycles and supporting pregnancy.

Drug delivery and translational research · 2019

Researchers observed that a new intravaginal ring delivering progesterone was well tolerated in sheep, with no significant irritation or abnormal findings. The ring provided a steady release of progesterone over 14 days, suggesting its potential for future use in preventing preterm birth in women.

• The intravaginal ring was retained and showed no significant irritation.
• Sustained release of progesterone was confirmed over the testing period.
• The results support further studies for potential human use.

Neurology · 1999

Researchers observed that many women with migraines, particularly those with menstrual migraines, may experience worsened symptoms as they approach menopause due to fluctuating estrogen levels. They found that maintaining stable estrogen levels through continuous hormone replacement therapy can help reduce migraine frequency and severity in these women.

• Fluctuating estrogen levels during menopause can increase migraine severity.
• Continuous hormone replacement therapy is preferred for women with migraines.
• Cyclic hormone therapy may worsen migraines in susceptible women.