follicular fluid

antral fluid, ovarian follicle

The fluid surrounding the ovum and granulosa cells in the ovarian follicle.

Type Organ
Parent Structure organism substance
Latin Name antral fluid, ovarian follicle
FMA ID 18665

Frequently Asked Questions

What does follicular fluid contain?
Follicular fluid is a complex mixture of plasma-derived components and substances secreted by granulosa and theca cells. It contains steroid hormones (estradiol, progesterone), growth factors (IGF-1, EGF), gonadotropins, proteoglycans, hyaluronic acid, and antioxidants — all of which create the microenvironment critical for oocyte maturation.
What is the role of follicular fluid in oocyte development?
Follicular fluid bathes the oocyte and its surrounding cumulus granulosa cells, supplying nutrients, signaling molecules, and hormones. The composition of follicular fluid directly influences oocyte quality, fertilization potential, and embryo development — making it a biomarker target in IVF research.
How is follicular fluid collected in clinical practice?
During in vitro fertilization (IVF) egg retrieval, follicular fluid is aspirated alongside the oocyte-cumulus complex using a fine needle guided by transvaginal ultrasound. The fluid is then examined in the embryology lab to locate and identify oocytes before proceeding with fertilization.

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Educational Disclaimer

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.