Final answer:
The Heylans study supports the biological theory of gender dysphoria by suggesting that genetic and prenatal hormonal factors may contribute to an individual's gender identity. Biological research in this area, along with significant variability in sexual orientation linked to genetics and differences in brain structures, aligns with the theory that gender dysphoria has innate elements.
Step-by-step explanation:
The Heylans study contributes to the biological perspective on gender dysphoria by demonstrating the potential influence of biological factors on this condition. While the Heylans study itself is not explicitly mentioned in the provided reference material, we can infer how such research would support the biological theory by exploring genetics and prenatal hormone levels as potential contributors to a person's gender identity. Studies have shown that genes may account for a significant portion of variability in human sexual orientation, and differences in brain structures among individuals with different sexual orientations suggest a biological component.
Moreover, the broader research in biological psychology that looks at genetic and hormonal influences aligns with the Heylans study's findings. This research supports the theory that aspects of gender dysphoria may be innate and linked to biological development rather than being purely a result of social factors. It is important to note, however, that the APA acknowledges the diversity of experiences in transgender individuals and emphasizes that multiple factors—including social and cultural—also contribute to gender identity formation.