Follicular phase
Follicular Phase
The Follicular Phase (pronounced: fuh-lik-yuh-lur feyz) is the first stage of the menstrual cycle. It is also known as the proliferative phase.
Etymology
The term "Follicular Phase" is derived from the Latin word "folliculus", which means "small bag". This is in reference to the ovarian follicles that mature during this phase.
Definition
The Follicular Phase is the period of the menstrual cycle during which follicles in the ovary mature. It ends with ovulation. The main hormone controlling this stage is estradiol.
Process
The Follicular Phase begins on the first day of menstruation and lasts until ovulation. During this phase, follicle-stimulating hormone (FSH) is secreted by the anterior pituitary gland. This hormone stimulates the growth of ovarian follicles in the ovary before the release of an egg from one follicle at ovulation.
Related Terms
- Menstrual Cycle: The monthly cycle of changes in the ovaries and the lining of the uterus (endometrium), starting with the preparation of an egg for fertilization.
- Ovulation: The release of the egg from the ovary.
- Luteal Phase: The second half of the menstrual cycle after ovulation.
- Estradiol: The primary female sex hormone.
- Follicle-stimulating hormone (FSH): A hormone secreted by the anterior pituitary gland that promotes the formation of ova or sperm.
External links
- Medical encyclopedia article on Follicular phase
- Wikipedia's article - Follicular phase
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