Follicle-Stimulating Hormone
Also written as: FSH — Follicle-Stimulating Hormone
A pituitary hormone used both as a biomarker for ovarian function and as a fertility medication.
Full Definition
Follicle-stimulating hormone is a glycoprotein hormone produced by the anterior pituitary gland that plays a crucial role in reproductive function by stimulating follicle development in the ovaries. In fertility assessment, baseline FSH levels (measured on cycle day 2-3) help evaluate ovarian reserve, with elevated levels suggesting diminished reserve. As a medication, recombinant FSH is used during controlled ovarian stimulation to promote multiple follicle development. FSH preparations include both recombinant and urinary-derived formulations with varying pharmacokinetic properties.
Usage
Usage note: Specify whether referring to endogenous FSH levels or exogenous FSH medication.
In Context
- "Baseline FSH of 12 mIU/mL indicates possible diminished ovarian reserve." — diagnostic workup
- "Recombinant FSH was administered daily starting on cycle day 3." — stimulation protocol