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The results showed that 76.6% of the study participants had consanguineous marriage between their parents, 64.1% had a history of hereditary deafness in first-degree relatives. There were statistically significant differences between the total knowledge, attitude, and self-efficacy before and after intervention (p less then 0.001). In detail, 76.6% of the participants had good knowledge after the intervention compared to only 12.5% before it. Besides, 81.3% of the study participants had a positive attitude toward PMSGC before the interv