Heritable factors influence sexual orientation in women.

@article{Bailey1993HeritableFI,
  title={Heritable factors influence sexual orientation in women.},
  author={J Michael Bailey and Richard C. Pillard and Michael C. Neale and Y Agyei},
  journal={Archives of general psychiatry},
  year={1993},
  volume={50 3},
  pages={217-23}
}
Homosexual female probands with monozygotic cotwins, dizygotic cotwins, or adoptive sisters were recruited using homophile publications. Sexual orientation of relatives was assessed either by asking relatives directly, or, when this was impossible, by asking the probands. Of the relatives whose sexual orientation could be confidently rated, 34 (48%) of 71… CONTINUE READING