This pilot study examined the effect of a low-dose E and pulsed progestogen hormone therapy (HT) regimen for add-back during long-term GnRH-agonist therapy on bone mineral density (BMD) in five patients with stage IV endometriosis. Bone mineral density was stable after initiation of HT for the entire follow-up period (up to 10 years). One patient stopped her treatment on two occasions to conceive and was successful each time with delivery of a normal baby. No patient had return of pelvic pain after HT add-back.
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