Follicular Phase
Updated:The follicular phase is the first part of the menstrual cycle, beginning on the first day of menstruation and ending with ovulation. During this phase, follicles in the ovary mature, and estrogen levels rise, preparing the body for potential pregnancy. This phase typically lasts about 14 days but can vary from person to person.
Additional Information
The follicular phase is characterized by several key events:
- The pituitary gland releases follicle-stimulating hormone (FSH), which stimulates the growth of several ovarian follicles.
- One follicle becomes dominant and continues to mature, while the others degenerate.
- The maturing follicle produces increasing amounts of estrogen, which causes the uterine lining to thicken.
- Near the end of this phase, a surge in luteinizing hormone (LH) triggers ovulation.
Understanding the follicular phase is crucial for those tracking fertility or using natural family planning methods. Some people may experience increased sexual desire during this phase due to rising estrogen levels.
Examples
Sarah tracks her follicular phase to predict her most fertile days for conception.
During her follicular phase, Emma notices changes in her cervical mucus, becoming clearer and more stretchy as ovulation approaches.