Progesterone - HRT Solutions

What is Progesterone?

Progesterone is a steroid hormone that plays an essential role in the female menstrual cycle and pregnancy. Here's an overview:

Key Functions

• Prepares the uterus lining for implantation of a fertilized egg
• Maintains pregnancy by supporting the developing fetus
• Involved in breast development and milk production during pregnancy

Where It Comes From

During the menstrual cycle, progesterone is produced mainly by the corpus luteum in the ovary after an egg has been released. The corpus luteum forms from the follicle that released the egg.

If pregnancy occurs, the placenta starts making progesterone around week 10 to support the pregnancy through term.

Changes Throughout the Cycle

• Follicular phase - Low levels
• Ovulation - Levels start rising
• Luteal phase - High levels to prepare for pregnancy
• Menstruation - Levels drop if no pregnancy occurs

Role in Pregnancy

Progesterone is absolutely vital for supporting pregnancy:

• Thickens uterine lining for implantation
• Reduces muscle contractions to prevent miscarriage
• Develops breast tissue and initiates milk production
• Helps regulate early fetal development

Progesterone supplements may be given to women at high risk of miscarriage or preterm birth to help support the pregnancy.

Testing Levels

Doctors may test progesterone levels across the menstrual cycle to check for ovulation or luteal phase issues. Low progesterone can cause problems with fertility and early miscarriage risk.

Levels may also be tested in pregnancy if hormone issues are suspected. However, target levels vary widely between women.

In summary, progesterone plays a key role in the female reproductive system, with important functions in the menstrual cycle, implantation, and maintaining pregnancy through to delivery. Monitoring levels helps assess fertility or support high-risk pregnancies.