Does letrozole during IVF stimulation help endometriosis?

Letrozole during ovarian stimulation is sometimes used in IVF protocols to blunt estrogen levels compared with a standard stimulation, because it blocks aromatase (the enzyme that helps your body make estrogen). Since endometriosis is often estrogen-responsive, keeping estrogen from climbing quite as high may help some patients feel more stable symptom-wise during a cycle, and it can be a useful tool when we’re trying to balance fertility goals with quality of life.

That said, letrozole is not a treatment that “heals” endometriosis. At best, it can help manage the hormonal environment during a short window; it doesn’t remove disease, reverse scarring, or correct the underlying inflammation and nerve involvement that drive many symptoms. If you’re considering IVF and worried about flare-ups or progression—especially if you suspect deep disease—our team can help you think through the right sequence (medical suppression vs. IVF timing vs. excision when appropriate) and how protocol choices like letrozole fit into your bigger plan.