Objective
To compare Anti-Mullerian Hormone (AMH) levels in women at high risk for hereditary breast and ovarian cancer compared to healthy, low-risk controls.
Design
Prospective cohort
Setting
Ambulatory
Patient(s)
Reproductive age women with a uterus and both ovaries were analyzed in four groups: BRCA1 carriers, BRCA2 carriers, BRCA negative, and low-risk controls
Intervention(s)
Self-collected dried blood spot (DBS)
Main Outcome Measure(s)
AMH levels
Result(s)
One hundred ninety-five women were included: 55 BRCA1 carriers, 50 BRCA2 carriers, 26 BRCA negative, and 64 low-risk controls. After adjusting for confounders, BRCA2 carriers had AMH levels that were 33% lower than controls (Geometric Mean Ratio(GMR)=0.67, 95% CI 0.47–0.94) and an increased odds of having AMH<1 ng/mL (OR 3.69, 95% CI 1.34–10.19). BRCA1 carriers and BRCA negative women had similar AMH levels to controls. When analysis was restricted to regularly menstruating women younger than 40, BRCA2 carriers continued to demonstrate significantly lower AMH levels and increased likelihood of low AMH. Also, in this restricted group, BRCA negative women demonstrated AMH levels that were 42% lower than controls (GMR=0.58; 95%CI 0.35–0.95). No difference in AMH was observed among BRCA1 carriers.
Conclusion(s)
We observed significantly lower AMH levels among BRCA2 carriers compared to low-risk controls. These results were stable across all models. BRCA negative women also had lower AMH values, but only in models restricted to young, regularly menstruating women. In contrast to previous analyses, BRCA1 carriers had AMH values that were similar to low-risk controls, but this may be due to differences in the population studied.