Follicle Stimulating Hormone(FSH)
hormoneDefinition
A hormone produced by the pituitary gland that stimulates the growth and development of ovarian follicles in women and sperm production in men.
In IVF Treatment
Baseline FSH is measured on cycle day 2 or 3 to assess ovarian reserve. Elevated FSH (above 10 IU/L) may indicate the ovaries need more stimulation and can predict a lower egg yield. FSH is also the active ingredient in many IVF stimulation medications.
Frequently Asked Questions
What does a high FSH level mean for IVF?
A high baseline FSH suggests diminished ovarian reserve, meaning the pituitary is working harder to stimulate egg development. It does not make IVF impossible, but may affect the number of eggs retrieved.
Can FSH levels change?
Yes. FSH can fluctuate cycle to cycle. Many clinics look at AMH alongside FSH for a fuller picture of ovarian reserve.