The Hidden Biology of Sexual Orientation: Epigenetic Modifications During Fetal Development
There is evidence suggesting that epigenetic mechanisms may contribute to sexual orientation, including homosexuality, though they are best understood as one component of a complex, multifactorial biological system rather than a single cause. Epigenetics refers to heritable changes in gene regulation, such as DNA methylation, histone modification, and non-coding RNA activity, that alter how genes are expressed without changing the underlying DNA sequence.