Progesterone is an endogenous steroid hormone vital for several bodily functions. It's primarily known for its role in the female reproductive system.
Sources of Progesterone
Progesterone is produced by various glands in the body:
- Adrenal Cortex: This part of the adrenal glands secretes progesterone.
- Gonads: The gonads, which include the ovaries in females and the testes in males, also produce progesterone.
- Ovaries: In women, progesterone is mainly secreted by the ovarian corpus luteum, especially during the first ten weeks of pregnancy.
- Placenta: Following the corpus luteum's activity, the placenta takes over progesterone production during the later phases of pregnancy.
Key Roles of Progesterone
While crucial for women, progesterone also has functions in men.
In Women
- Menstrual Cycle Regulation: Progesterone plays a vital role in regulating the menstrual cycle.
- Pregnancy: It prepares the uterus lining for implantation of a fertilized egg and supports pregnancy by maintaining the uterine lining.
- Breast Tissue Development: Progesterone contributes to the development of breast tissue during pregnancy.
In Men
- Progesterone is present in males, although typically at lower levels than in females.
- It serves as a precursor to other steroid hormones.
Summary
| Feature | Description |
|---|---|
| Type | Endogenous steroid hormone |
| Produced by | Adrenal cortex, ovaries (corpus luteum, placenta), and testes |
| Function | Regulates menstrual cycle, prepares the uterus for pregnancy, supports breast tissue development, precursor to other steroid hormones. |
