Can endometriosis lower AMH without surgery?

Yes—it can, especially when endometriosis involves the ovaries. An ovarian endometrioma can affect ovarian tissue through chronic inflammation and internal scarring (fibrosis), which may reduce ovarian function over time even if you’ve never had surgery.

That said, AMH is a single “whole-picture” blood test and doesn’t always capture what’s happening ovary-by-ovary. In people with endometriomas, the antral follicle count (AFC) on ultrasound—especially per ovary—may show a clearer local impact than AMH, and changes can relate to whether the cyst is one-sided vs both sides and how large it is.

If you’re seeing a lower AMH and trying to understand what it means for your timeline and options, we can help you interpret AMH alongside AFC, imaging findings, and your goals (pain control, fertility planning, or both) so you’re not making big decisions based on one number alone. If you’d like, reach out to schedule a consultation with our team.