Management of Amenorrhea After Lupron Treatment for Endometriosis

Assessment of Current Situation

Leuprolide acetate (Lupron) is a GnRH agonist that creates a hypoestrogenic state, effectively suppressing ovarian function and menstruation during treatment, according to the American College of Radiology 1
After discontinuation of Lupron, return of menses typically occurs within 4-12 weeks, but can be delayed in some patients, as reported by the Centers for Disease Control and Prevention 1, 2
Persistent amenorrhea 4 months after stopping therapy warrants further evaluation to rule out structural abnormalities or other causes, as recommended by the MMWR Recommendations and Reports 2

Transvaginal ultrasound is the preferred initial imaging modality to evaluate for structural causes of amenorrhea, with assessment of endometrial thickness, ovarian follicle counts, and evaluation for any masses, according to the Journal of the American College of Radiology 3, 4, 5, 6
The American College of Radiology recommends checking serum β-hCG to rule out pregnancy, and considering FSH, LH, estradiol levels to assess ovarian function 2, 5, 7

If normal imaging and laboratory results, the American College of Radiology suggests considering initiating a progestin challenge to induce withdrawal bleeding, and using combined hormonal contraceptives to restore regular menstrual cycles and provide ongoing endometriosis management 1, 2, 5
If abnormal findings on ultrasound, referral to gynecology for further evaluation and possible surgical management if deep infiltrating endometriosis is detected, and MRI pelvis may be indicated if deep endometriosis is suspected but not clearly visualized on ultrasound, as recommended by the Journal of the American College of Radiology 4, 5, 6

The depth of endometriosis lesions correlates with severity of symptoms and may influence management decisions, according to the American Academy of Family Physicians and the American College of Radiology 1, 7
Up to 44% of women experience symptom recurrence within one year after endometriosis treatment, requiring ongoing management, as reported by the American College of Radiology 1
Persistent amenorrhea may be concerning for bone mineral density loss if hypoestrogenic state continues, according to the American College of Radiology 1