Follicular Phase
Definition
The follicular phase is the first half of the menstrual cycle, beginning on the first day of menstruation and ending at ovulation. During this phase, follicle-stimulating hormone (FSH) stimulates ovarian follicles to mature, and rising estrogen levels thicken the uterine lining in preparation for potential pregnancy.
Why It Matters
The follicular phase sets the stage for ovulation and conception. A healthy follicular phase is marked by balanced FSH and estrogen levels, which support egg quality and endometrial development. Disruptions in this phase—such as prolonged or shortened duration—can indicate hormonal imbalances affecting fertility.
Related Conditions
Related Modalities
Frequently Asked Questions
The follicular phase typically lasts 10–21 days, with an average of 14 days. Variability in cycle length is usually due to follicular phase differences. A prolonged follicular phase may indicate delayed ovulation, often seen in PCOS or thyroid dysfunction.
Optimize the follicular phase with antioxidant-rich foods to support egg quality, adequate protein and healthy fats, stress management, regular movement, and herbs like maca or red raspberry leaf. Seed cycling with flax and pumpkin seeds during this phase may also support estrogen balance.
Dr. Sanika Kshirsagar, ND
Doctorate of Naturopathic Medicine (ND)
Bastyr University, Kenmore, WA
Medical Disclaimer: The information and content provided on this website is for informational purposes only and not intended to diagnose or treat any condition. It is not meant to substitute for the professional advice provided by your physician or any other healthcare professional. If you suspect that you have a medical problem, contact your healthcare provider promptly. Do not disregard professional medical advice or delay in seeking professional advice because of something you have read on this website.