Single Ovary Removal (Oophorectomy): Impact on Hormones, Menstruation, and Menopause Timing
What Happens After Unilateral Oophorectomy
- Ovarian reserve halved → fewer remaining follicles.
- Compensation: Remaining ovary often increases output (↑ gonadotropin sensitivity), maintaining cycles and hormone levels.
- Menstrual changes: Possible transient irregularity or lighter flow; usually normalizes.
- Menopause timing: May occur slightly earlier (1–2 years) on average, but not immediate. Age at surgery matters most.
- Fertility: Reduced but not eliminated; IVF outcomes correlate with antral follicle count.
Individual Variation
Underlying conditions (endometriosis, BRCA, autoimmune) and surgical technique influence outcomes. Hormone testing (AMH, FSH, estradiol) and fertility counseling provide personalized guidance.
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