id: sig-20260710-migraine-certainty
site_id: migraine-headache
site_hint: "Migraine and headache — symptom"
attribute: certainty
value: "The estrogen-withdrawal hypothesis is widely cited but the supporting evidence remains limited, constrained by methodologic inconsistencies and variable case definitions."
source_url: https://pubmed.ncbi.nlm.nih.gov/37730536/
source_title: "Migraine in menopause (The Journal of Headache and Pain 2023, PMID 37730536)"
publisher: The Journal of Headache and Pain
source_date: "2023"
observed_date: "2026-07-10"
collected_by: gn_info_scout/1.0.0
confidence: high